What it means for triangles to be congruent
Watch the next lesson: https://www.khanacademy.org/math/geometry/congruent-triangles/cong_triangle/v/sss-to-show-a-radius-is-perpendicular-to-a-chord-that-it-bisects?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry
Missed the previous lesson?
https://www.khanacademy.org/math/geometry/congruent-triangles/transformations-congruence/v/another-example-of-rigid-transformations-for-congruence?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry
Geometry on Khan Academy: We are surrounded by space. And that space contains lots of things. And these things have shapes. In geometry we are concerned with the nature of these shapes, how we define them, and what they teach us about the world at large--from math to architecture to biology to astronomy (and everything in between). Learning geometry is about more than just taking your medicine ("It's good for you!"), it's at the core of everything that exists--including you. Having said all that, some of the specific topics we'll cover include angles, intersecting lines, right triangles, perimeter, area, volume, circles, triangles, quadrilaterals, analytic geometry, and geometric constructions. Wow. That's a lot. To summarize: it's difficult to imagine any area of math that is more widely used than geometry.
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
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Khan Academy

Triangle Congruency and Constructions: SAS, SSS, ASA.
Write, share, and store your lesson plans at http://lesson-connect.com .

Просмотров: 123
Aaron Kennedy

Maths Congruence of Triangles part 1 (Introduction) CBSE Class 7 Mathematics VII

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ExamFear Education

Proofs give students much trouble, so let's give them some trouble back! In this lesson we cover the four main methods of proving triangles congruent, including SSS, SAS, ASA, and AAS. We cover CPCTC as well. In the two proofs covered, one involves parallel lines and the other triangles back to back, using the reflexive property. YAY MATH!
Please visit yaymath.org
Videos copyright (c) Yay Math

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yaymath

Geometry Teachers Never Spend Time Trying to Find Materials for Your Lessons Again!
Join Our Geometry Teacher Community Today!
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http://www.moomoomath.com/Proving-triangles-congruent.html
Introduction to congruent triangles. This video explains five methods for proving that triangles are congruent. The five methods for triangle congruence are
SSS Side Side Side
SAS Side Angle Side
ASA Angle Side Angle
AAS Angle Angle Side
HL Hypotenuse Leg
In addition each method has several examples and explains why the triangles are congruent along with tips and guidance from a veteran Geometry teacher.
You may also enjoy….
ASA Proof
https://www.youtube.com/watch?v=sxQqCFKNy5U
Angle side Angle with congruent triangles
https://www.youtube.com/watch?v=rlbwHBqu3tg
Congruent Triangles
https://www.youtube.com/watch?v=eWfEXKmNCkY
Hypotenuse/Angle Side Angle
https://www.youtube.com/watch?v=5ZNAQ5Enx8I
Khan Academy Congruent Triangles
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Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
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MooMoo Math and Science

Let's explore the difference between similar and congruent figures (similarity vs. congruence) in this conceptual mini-lesson.
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Learning Standards (8th Grade Geometry):
Understand congruence and similarity using physical models, transparencies, or geometry software.
8.G.A.4
Understand that a two-dimensional figure is similar to another if the second can be obtained from the first by a sequence of rotations, reflections, translations, and dilations; given two similar two-dimensional figures, describe a sequence that exhibits the similarity between them.
What does it mean when two figures are similar?
What does it mean when two figures are congruent?
What is the difference between similarity and conrguence?
Image Credit: Emojis provided free by http://emojione.com
Our lessons are perfect for flipped classroom math teachers and students. This lesson is aligned with the common core learning standards for math and the SAT math curriculum as well.
MashUp Math is a great free resource for math students, parents, and teachers. Our lessons are a great resource for struggling students, flipped classroom educators, and homeschool math students.
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Our Mission: MashUp Math is our creative solution to reviving students' passion and interest for learning mathematics. As young educators, we know that all students learn math differently and that a one-size-fits-all approach is simply ineffective. The idea that the ability to understand mathematics is reserved for a select few did not sit well with us.
In addition to sharing free teacher resources (which are teacher created resources) in the form of teacher worksheets, we share new YouTube math videos every week that help math teachers and students to better understand mathematics and the common core. Our lessons can be aligned with the common core standards for common core math and are immensely popular with flipped learning educators and anyone experimenting with flipped classroom learning.
As educators, we know what it takes to be a super math teacher and that we can’t always do it alone. In addition to our cool math videos, we share articles, blogs, inspirational quotes, teacher math worksheets, and math worksheets. Whether you teach in the flipped classroom, operate in blended education or online blended learning, or are interested in finding cool math online, MashUp Math will have something for you!
Many students think of us as a math tutor online or as their on-demand online tutor. Others trust us for all things related to online math education—coming to use when they find themselves thinking “I don’t understand my homework assignment! and need some homework help!
It is also a part of our mission to make progressive steps in mathematics education. For one, our content is created with the goal of moving students from a fixed mindset to a growth mindset. We also aim to meet the unique needs of ESL math students and support math for girls as well.
Many of our users serve as a special education teacher and use our cool videos to support their special education students with special needs. Our free online math lessons are also high adaptable to your homeschool curriculum and should be added to your list of free homeschool resources.
We are also very involved in the edtech world and are very popular with Google Classroom educators, Math Games Classroom Educators, and teachers who support the use of iPad for education!
So if you could use some help with everyday math and are a student with a unique learning style or learning styles—like Visual Auditory Learning! Or if you’re tired of math games and are more interested in an easy-to-follow tutorial, check us out and learn math with us. No matter your school’s standards of learning, our YouTube Math Videos Lessons will work for you!

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MashUp Math

http://www.kidsmathtv.com. What are congruent and non congruent figures ? Teach kids about congruency and geometry in this math video. Suitable 2nd, 3rd and 4th grade math lesson.

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Kisi KidsMathTV

Click this link for eduzon Mobile App from Google Play Store: https://play.google.com/store/apps/details?id=com.app.eduzonin
For full video lessons visit our Website : http://www.eduzon.in/
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eduzon.in

Interactive Notetaking

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Melissa Bennett

Learn More at mathantics.com
Visit http://www.mathantics.com for more Free math videos and additional subscription based content!

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mathantics

Geometry Teachers Never Spend Time Trying to Find Materials for Your Lessons Again!
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How to use side angle side in order to find the area of a triangle.
If you have a triangle with a side of 9 and a side of 15 along with an angle of 110 degrees you can use side angle side "SAS" in order to find the area.
The formula you would use is
1/2*side*side * sin of the angle
Questions answered with this video..
When would you use "SAS" side angle side to find area?
If a triangle has side lengths of 9 and 15 units how do you find the area?
What is an included angle?
How do you find sine on a calculator?
You may also enjoy…..
Area of Triangle
https://www.youtube.com/watch?v=Dt5fi89gA-0
Triangle Area
https://www.youtube.com/watch?v=xz6gBA0M9FY
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http://www.moomoomath.com/
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MooMoo Math and Science

Learn about congruent sides and angles of triangles, their differences and likenesses. Learn how to identify them, what the little marks and arcs on them stand for, even what the word triangle actually means. #11.2

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JoAnn's School

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Prove △ABD≌ △CBD
Video explains how to prove that these two triangle are congruent by using Side Side Side ( SSS)
Each statement of the theorem is explained.
Common Core Standard G.CO.8
You may also enjoy….
ASA Proof
https://www.youtube.com/watch?v=sxQqCFKNy5U
Angle side Angle with congruent triangles
https://www.youtube.com/watch?v=rlbwHBqu3tg
Congruent Triangles
https://www.youtube.com/watch?v=eWfEXKmNCkY
Hypotenuse/Angle Side Angle
https://www.youtube.com/watch?v=5ZNAQ5Enx8I
Khan Academy Congruent Triangles
-~-~~-~~~-~~-~-
Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
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MooMoo Math and Science

Geometry Teachers Never Spend Time Trying to Find Materials for Your Lessons Again!
Join Our Geometry Teacher Community Today!
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http://www.moomoomath.com/angle-side-angle.html
Video outlines when to use angle side angle when proving that triangles are congruent. Several examples problems are worked out.
You may also enjoy….
ASA Proof
https://www.youtube.com/watch?v=sxQqCFKNy5U
Angle side Angle with congruent triangles
https://www.youtube.com/watch?v=rlbwHBqu3tg
Congruent Triangles
https://www.youtube.com/watch?v=eWfEXKmNCkY
Hypotenuse/Angle Side Angle
https://www.youtube.com/watch?v=5ZNAQ5Enx8I
Khan Academy Congruent Triangles
-~-~~-~~~-~~-~-
Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
-~-~~-~~~-~~-~-

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MooMoo Math and Science

Subscribe Now:
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Watch More:
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Congruent figures are first taught to students in basic form at the elementary level. Teach congruent figures to students with help from an experienced mathematics educator in this free video clip.
Expert: Marija Kero
Filmmaker: Victor Varnado
Series Description: A lot of mathematics problems can be boiled down to their essential concepts, thus making them significantly easier to solve. Get tips on fun math problems with help from an experienced mathematics educator in this free video series.

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eHowEducation

A short lesson on classifying different types of triangle.

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Mr Chapman

Watch Sal work through a basic Congruence and similarity problem.
Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s6-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT
Missed the previous lesson?
https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s2-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT
New SAT (starting March 2016) on Khan Academy: Practice all of the skills you’ll need for the new SAT. We also have four official practice exams from College Board. The October 2015 PSAT is in the style of the new SAT.
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
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Khan Academy

Discover more at www.ck12.org: http://www.ck12.org/geometry/SAS-Triangle-Congruence/
Here you'll learn how to prove that triangles are congruent given information only about two of their sides and the angle between those two sides.
This video provides the student with a walkthrough on SAS triangle congruence.
This is part of CK-12’s Basic Geometry: Triangles and Congruence. See more at:
1. Triangle Sum Theorem:
http://www.ck12.org/geometry/Triangle-Sum-Theorem/
2. Exterior Angles Theorems:
http://www.ck12.org/geometry/Exterior-Angles-Theorems/
3. Congruent Triangles:
http://www.ck12.org/geometry/Congruent-Triangles/
4. Congruence Statements:
http://www.ck12.org/geometry/Congruence-Statements/
5. Third Angle Theorem:
http://www.ck12.org/geometry/Third-Angle-Theorem/
6. SSS Triangle Congruence:
http://www.ck12.org/geometry/SSS-Triangle-Congruence/
7. SAS Triangle Congruence:
http://www.ck12.org/geometry/SAS-Triangle-Congruence/
8. ASA and AAS Triangle Congruence:
http://www.ck12.org/geometry/ASA-and-AAS-Triangle-Congruence/
9. HL Triangle Congruence:
http://www.ck12.org/geometry/HL-Triangle-Congruence/
10. Isosceles Triangles:
http://www.ck12.org/geometry/Isosceles-Triangles/
11. Equilateral Triangles:
http://www.ck12.org/geometry/Equilateral-Triangles/
Watch the whole series of CK-12's Basic Geometry videos: https://www.youtube.com/playlist?list=PLhWx3LZhlpseSm7selpF8lEq_jtiOqpDX

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CK-12 Foundation

College Prep Geometry.
Lesson on congruent triangles.

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Corey Bell

We classify a bunch of triangles as either acute, right, or obtuse (classification by angles), and as either scalene, isosceles, or equilateral (classification by sides).
Then we tackle two drawing problems that concern triangles. Drawing is at the heart of what geometry is all about and it is both a hands-on activity, which students like, and also requires geometric reasoning about the attributes.
This lesson is meant for 5th grade and onward.
Check out also my free books and worksheets at http://www.mathmammoth.com/free

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Math Mammoth

MathHelp.com - http://www.MathHelp.com - offers a comprehensive library of geometry lesson plans featuring a personal geometry teacher inside every lesson!

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MathHelp.com

Geometry Teachers Never Spend Time Trying to Find Materials for Your Lessons Again!
Join Our Geometry Teacher Community Today!
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The video looks at three pairs of triangles and demonstrates how the triangles are congruent using Side Side Side postulate.
Common Core Standard G.CO.8
00:12 Explains and demonstrates what a SSS triangle looks like
00:25 Compares two congruent triangles by looking at the triangle markings and list the congruent sides
01:16 Looks at another pair of congruent triangles and shows how the triangles are congruent by listing which three sides are congruent.
02:47 Proves two triangles are congruent using SSS
You may also enjoy….
ASA Proof
https://www.youtube.com/watch?v=sxQqCFKNy5U
Angle side Angle with congruent triangles
https://www.youtube.com/watch?v=rlbwHBqu3tg
Congruent Triangles
https://www.youtube.com/watch?v=eWfEXKmNCkY
Hypotenuse/Angle Side Angle
https://www.youtube.com/watch?v=5ZNAQ5Enx8I
Khan Academy Congruent Triangles
-~-~~-~~~-~~-~-
Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
-~-~~-~~~-~~-~-

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MooMoo Math and Science

Geometry Teachers Never Spend Time Trying to Find Materials for Your Lessons Again!
Join Our Geometry Teacher Community Today!
http://geometrycoach.com/Geometry-Lesson-Plans/?pa=MOOMOOMATH
Properties of similar triangles
Triangles are similar if they have the same shape,but not necessarily the same size.
Properties of similar triangles
The corresponding angles are the same
The corresponding sides are in proportion
We can prove triangles are similar by:
Angle Angle ( two angles congruent to two angles of another triangle)
Side Side Side ( ll three sides in proportion to all three sides of another vtriangle)
Side Angle Side ( two proportional sides with congruent angle in between)
The video "Similar Properties" reviews these properties and provides examles.
-~-~~-~~~-~~-~-
Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
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MooMoo Math and Science

http://www.theteachertoolkit.com/
See Leticia Garza, middle school math teacher, using Triangle Square Circle to assess her students' learning at the end of class. This strategy encourages students to reflect on their learning and process information presented in the lesson. Similar to other closing strategies, it asks students to pick out important pieces of information and to question anything they don’t completely understand. As a teacher, it is a tool that will be used to gauge understanding and determine if anything needs to be re-addressed in future lessons.
Find more tips and videos at: www.theteachertoolkit.com

Просмотров: 831
ESC Region 13

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Triangle inequalities help define triangles and state that the sum of any two sides of a triangle must be greater than the third side, For a summary of the video and a practice link go to http://moomoomath.com
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Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
-~-~~-~~~-~~-~-

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MooMoo Math and Science

Play this video lesson to teach Grade 2 kids - "Congruent Shapes", figures that have the same size and shape.

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Turtlediary

Geometry Teachers Never Spend Time Trying to Find Materials for Your Lessons Again!
Join Our Geometry Teacher Community Today!
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http://moomoomath.com
http://www.moomoomath.com/Isosceles.html
In this video you will learn..
Isosceles triangle definition
that two sides are congruent
that two angles of an isosceles triangle are congruent
You may also enjoy…
Isosceles Triangle Theorem
https://www.youtube.com/watch?v=Tqh7RGWd480
What is an Isosceles Triangle
https://www.youtube.com/watch?v=PZR8Xv6OJR0
-~-~~-~~~-~~-~-
Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
-~-~~-~~~-~~-~-

Просмотров: 16257
MooMoo Math and Science

Просмотров: 50
Devwart Dagar

Mr Rakesh Thakur has 22 years experience in teaching.At present Mr Rakesh Thakur is Adhyapak (Mathematics) in Govt Girl's Higher Secondary School Nainpur District Mandla Madhya-Pradesh. He is Samvida Grade-1 & Samvida Grade-3 Examination qualified. He has MSc(Maths), MA(Economics), BEd,
& PGDCA.

Просмотров: 192
GA study

In this video, you will learn how to solve the most common SAT congruent triangle problems. The video also includes practice problems for you to solve along with complete solutions.

Просмотров: 28
Jessica Ramer

This video forms part of the OLICO Youth Mathematics programme, which can be found at www.learn.olico.org.
Lesson code: Grade 9 Geometry 7
Website: olico.org
Facebook: www.facebook.com/olicoyouth
Twitter: twitter.com/olicoyouth
This video is published under the Creative Commons Attribution-NonCommercial 3.0 Unported License (CC BY-NC) and you are free to use it for non-commercial purposes.

Просмотров: 317
olicoTV

Triangles - Solution for Class 9th mathematics, NCERT & R.D Sharma solutions for Class 9th Maths. Get Textbook solutions for maths from evidyarthi.in

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Mathematics Class IX

Geometry Teachers Never Spend Time Trying to Find Materials for Your Lessons Again!
Join Our Geometry Teacher Community Today!
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The vertex angle of an isosceles triangle is the non congruent angle and is opposite the base
The video describes the vertex angle and works two sample problems
What are the measure of the base angles given a vertex angle of 110 degrees?
What is the measure of the vertex angle given a base angle of 70 degrees?
You may also enjoy…
Isosceles Triangle Theorem/Your Teacher-Math Help
https://www.youtube.com/watch?v=Tqh7RGWd480
What is an Isosceles Triangle
https://www.youtube.com/watch?v=PZR8Xv6OJR0
Constructing an Isosceles Triangle, Given a Vertex and Midsegment
https://www.youtube.com/watch?v=OH7ljH9BUJ4
Isosceles Triangle-6th Grade Math
http://www.moomoomath.com/Isosceles.html
-~-~~-~~~-~~-~-
Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
-~-~~-~~~-~~-~-

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MooMoo Math and Science

Geometry Teachers Never Spend Time Trying to Find Materials for Your Lessons Again!
Join Our Geometry Teacher Community Today!
http://geometrycoach.com/Geometry-Lesson-Plans/?pa=MOOMOOMATH
Math Video Definitions Cevian in Geometry--
A Cevian is a line, line segment, or ray with one end point on the vertex of a triangle, and the other end point on the opposite side of the triangle.
Common examples include the altitude of a triangle, angle bisectors, and medians.
-~-~~-~~~-~~-~-
Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
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MooMoo Math and Science

Geometry Teachers Never Spend Time Trying to Find Materials for Your Lessons Again!
Join Our Geometry Teacher Community Today!
http://geometrycoach.com/Geometry-Lesson-Plans/?pa=MOOMOOMATH
Properties of a rhombus,rectangle, and a square
A rhombus,rectangle, and square are all polygons.
In addition each of these are quadrilaterals, which mean they have 4 sides.
A rhombus is a quadrilateral with 4 equal sides. A rhombus is most commonly recognized as a diamond, but they are not limited to this shape.
Let's take a look at 14 properties of a rhombus.
A Rhombus is a Quadrilateral, which means it has four sides, and the sides of a rhombus are congruent.
The opposite sides of a rhombus are parallel.
The opposite angles of a Rhombus are congruent.
The diagonals of a rhombus are perpendicular.
The diagonals of a Rhombus create form four congruent interior triangles.
The diagonals of a rhombus bisect each other which means they cut each other in half.
A rectangle has opposite sides that are congruent. in addition a rectangle has 4 right angles, and diagonals that are equal.
A rectangle is part of the quadrilateral family.
A rectangle is a plane shape with 4 sides.
In addition, it has several other properties
A rectangle is a 4 sided polygon, with opposite sides being parallel.
In addition, a rectangle has 4 right angles and the sum of the interior angles add to 360 degrees.
The diagonals of a rectangle are equal length
The diagonals bisect and create two equal triangles.
Opposite sides are equal and parallel
All squares are rectangles, but not all rectangles are squares.
A square is also a quadrilateral with four equal sides plus four right angles. The diagonals of a square bisect one another, plus bisect opposite angles which creates two angles of 45 degrees.
A square is a plane shape that is a quadrilateral that is 2D so it has length and width but not height.
A square has 4 congruent sides 4 equal sides.
Along with these 4 sides a square has 4 right angles
The diagonals are perpendicular and create 4 right angles.
The diagonals bisect each other.
The diagonals of a square also bisect opposite angles
and create equal 45 degree angles.
The diagonals create congruent triangles
Triangle ABC is congruent to ACD
A square can be considered a rhombus with four right angles or a square with 4 equal sides.
Rhombus properties| Quadrilateral Properties| Properties of Parallelograms | Square Rhombus | Rhombus Definition | Rectangle Definition |
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Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
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MooMoo Math and Science

Great geometry primer on perimeter and area. Listen carefully. Sal explains the concepts so you'll understand them.
Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/geometry/basic-geometry/perimeter_area_tutorial/e/area_of_triangles_1?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry
Watch the next lesson: https://www.khanacademy.org/math/geometry/basic-geometry/perimeter_area_tutorial/v/triangle-area-proofs?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry
Missed the previous lesson?
https://www.khanacademy.org/math/geometry/right_triangles_topic/cc-geometry-trig-similarity/v/example-relating-trig-function-to-side-ratios?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry
Geometry on Khan Academy: We are surrounded by space. And that space contains lots of things. And these things have shapes. In geometry we are concerned with the nature of these shapes, how we define them, and what they teach us about the world at large--from math to architecture to biology to astronomy (and everything in between). Learning geometry is about more than just taking your medicine ("It's good for you!"), it's at the core of everything that exists--including you. Having said all that, some of the specific topics we'll cover include angles, intersecting lines, right triangles, perimeter, area, volume, circles, triangles, quadrilaterals, analytic geometry, and geometric constructions. Wow. That's a lot. To summarize: it's difficult to imagine any area of math that is more widely used than geometry.
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
Subscribe to Khan Academy’s Geometry channel:
https://www.youtube.com/channel/UCD3OtKxPRUFw8kzYlhJXa1Q?sub_confirmation=1
Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy

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Khan Academy

Geometry Teachers Never Spend Time Trying to Find Materials for Your Lessons Again!
Join Our Geometry Teacher Community Today!
http://geometrycoach.com/Geometry-Lesson-Plans/?pa=MOOMOOMATH
http://www.moomoomath.com/Special-Right-triangles.html
Special right triangles are triangles that have regular patterns that makes calculations of the triangle easier. Two common special right triangles, are the 30-60-90 triangle and the 45-45-90 triangle
Transcript
Special Right Triangles
Hi welcome to MooMooMath. Today we are going to look at two type's special right triangles. The first type is 30-60=90 triangles and the second type is the 45-45-90 type triangle. Something special about the 30-60-90 triangle is that all three angles are different therefore all three sides are different, so this triangle is scalene because all three sides are different. So let's draw a 30-60=90 triangle. So if this is my triangle the smallest is this 30 degree angle and this other acute angle would be my 60 degree angle and of course my right angle would be my 90 degree angle. Now opposite my smallest angle is the shortest leg, the longer leg is opposite 60 degree angle and the right angle is always opposite the hypotenuse. So that's how you would label it. So go ahead and label the short, long leg, and the hypotenuse. Now on a 45-45-90 notice you have two angles that are congruent, therefore we have an isosceles triangle which is a triangle with two sides that are the same length and these two angles are my 45 degree angles. So this angle is 45 and this angle is 45. Since these two angles are congruent the legs will be congruent. So these are my two legs. Leg 1 and leg 2 and this is my hypotenuse because it is opposite the 90 degree angle and it is the longest side in a right triangle. So I hope this video of right triangle was helpful, we have two other videos, one which focuses on solving for 30-60-90 triangle and another that solves for 45-45-90 degree triangles.
.For a summary of the video and a practice link go to http://moomoomath.com
You may also enjoy…
Special right triangles in Geometry 30-60-90 45-45-90
https://www.youtube.com/watch?v=nVTtSE5nv7c
Special Right Triangle Explanation
https://www.youtube.com/watch?v=nVTtSE5nv7c
Special right triangles
https://www.youtube.com/watch?v=nVTtSE5nv7c
-~-~~-~~~-~~-~-
Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
-~-~~-~~~-~~-~-

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MooMoo Math and Science

🍎 Enjoy our growing library of math videos at https://www.numberock.com 🍎
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What/Who is NUMBEROCK?
We make animated math videos and educational songs for kids that bring joy back into math class and make it cool again! Up until today, we have created nearly 30 animated music videos that cover mathematical concepts for 3rd Grade, 4th Grade, and 5th Grade; concepts like, Rounding Numbers, Ordering Decimals, Subtraction, 3D Shapes, Types of Angles and much more!
We're curious to see how our teaching resource will be used now that we have shared them with a broader audience. Thanks for your interest.
How did NUMBEROCK begin?
When you look at the entertainment that’s being
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Altogether, from 2008 to now, I’ve written songs for
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I hope your student(s) will find a renewed passion for math as
they access the NUMBEROCK method.

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NUMBEROCK Math Songs

Introduction to what it means for triangles to be similar
Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/geometry/similarity/triangle_similarlity/e/similar_triangles_1?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry
Watch the next lesson: https://www.khanacademy.org/math/geometry/similarity/triangle_similarlity/v/similarity-postulates?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry
Missed the previous lesson?
https://www.khanacademy.org/math/geometry/similarity/similarity-and-transformations/v/quadrilateral-similarity-by-showing-congruent-angles?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry
Geometry on Khan Academy: We are surrounded by space. And that space contains lots of things. And these things have shapes. In geometry we are concerned with the nature of these shapes, how we define them, and what they teach us about the world at large--from math to architecture to biology to astronomy (and everything in between). Learning geometry is about more than just taking your medicine ("It's good for you!"), it's at the core of everything that exists--including you. Having said all that, some of the specific topics we'll cover include angles, intersecting lines, right triangles, perimeter, area, volume, circles, triangles, quadrilaterals, analytic geometry, and geometric constructions. Wow. That's a lot. To summarize: it's difficult to imagine any area of math that is more widely used than geometry.
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
Subscribe to Khan Academy’s Geometry channel:
https://www.youtube.com/channel/UCD3OtKxPRUFw8kzYlhJXa1Q?sub_confirmation=1
Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy

Просмотров: 352125
Khan Academy

Geometry Teachers Never Spend Time Trying to Find Materials for Your Lessons Again!
Join Our Geometry Teacher Community Today!
http://geometrycoach.com/Geometry-Lesson-Plans/?pa=MOOMOOMATH
Triangle vocabulary
In this video, I review the following triangle vocabulary that is used in Geometry
Triangle inequality theorem
Median of a triangle
orthocenter
Exterior angle theorem
Angle side relationship
Geometric mean
Scalene, Isosceles, Equilateral
Acute, Right, Obtuse, Equiangular
-~-~~-~~~-~~-~-
Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
-~-~~-~~~-~~-~-

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MooMoo Math and Science

Geometer's Sketchpad Activity - SSS, SAS, HL, ASA
This is a high school Geometer Sketchpad activity intended to promote understanding of triangle congruent postulates and theorems.
This activity requires a full 50 minute class period with students who are already experienced with GSP.
Geometer's Sketchpad, GSP, provides dynamic constructions. This activity follows classical constructions on paper.
Postulate 19: Side-Side-Side Congruence postulate
SSS
If three sides of one triangle are congruent to three sides of another triangle, then the two triangles are congruent.
POSTULATE 20; Side-Angle-Side (SAS) Congruence Postulate
If two sides and the included angle of one triangle are congruent to two sides and the included angle of a second triangle, then the two
triangles are congruent.
THEOREM 4.5; Hypotenuse-Leg (HL) Congruence Theorem
If the hypotenuse and a leg of a right triangle are congruent to the hypotenuse and a leg of a second triangle, then the two triangles are congruent.
POSTULATE 21 Angle-Side-Angle (ASA) Congruence Postulate
If two angles and the included side of one triangle are congruent to two angles and the includes side of another triangle, then the two triangles are congruent.

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Jeffrey Bannish

Geometry Teachers Never Spend Time Trying to Find Materials for Your Lessons Again!
Join Our Geometry Teacher Community Today!
http://geometrycoach.com/Geometry-Lesson-Plans/?pa=MOOMOOMATH
http://www.moomoomath.com/Definition-of-Scalene-Triangle.html
What is a scalene triangle?
Transcript
Scalene Triangles
Welcome to MooMooMath. Today we are talking about Scalene Triangles. A scalene triangle is one in which all three angles are different. So let's look at two examples. I'm going to mark these triangles 3 inches, 4 inches, and 5 inches. All three sides are different lengths. This triangle over here is marked such that all three sides are the same. The mark on the side represents equal lengths. This is actually an equilateral triangle. Now let's look at a scalene triangle based on angles. You have a forty five degree angle, a forty five degree angle, and a ninety degree angle, and over here you have a 60 degree angle, a 30 degree angle, and a ninety degree angle. So based on angles which of these is a scalene angle? This one here (circles the triangle with 60, 30, 90 degree angles) because all three angles are different or all three sides are different. The other triangle these two angles are the same meaning these two legs are the same so this one is actually what they call an isosceles triangle. So let's look at the rules. The definition is all sides are different lengths and all angles are different measures. So our 3, 4, 5, is our example. Hope this video was helpful.
For a summary of the video and a practice link go to http://moomoomath.com
-~-~~-~~~-~~-~-
Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
-~-~~-~~~-~~-~-

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MooMoo Math and Science

In this Geometry lesson you will learn about proving angles congruent. You will learn about the Congruent Supplements Theorem, the Congruent Complements Theorem, the Right Angle Congruence Theorem, the Linear Pair Postulate and the Vertical Angles Theorem.

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Math is FUNdamental

This is the video of CBSE Class 10 Mathematics - Triangles.
Topics covered in this video are as follows-
Congruency, Similiarity, Recalling Congruency And Similiarity, Similar Polygons, Thales Theorem- Corollary of Thales Theorem, Converse of Thales Theorem, Concepts of parallelogram, Proof of Thales Theorem, Proof of Converse of Thales Theorem, Criteria for Similiarity of Triangles, Congruent and Similar Triangles- Theorem 1, Theorem 2, Theorem 3, Conclusion of 3 Theorems, Overlaping Triangles, Perimeter Based Questions, Shadow Formation, Similiarity and Thales theorem, Advanced and Miscelleneous Questions, Proofs of Theorems- Theorem 1, Theorem 2, Theorem 3, Area of Similar Triangles- Theorem, Theorem's Proof, Pythagoras Theorem, Converse of Pythagoras Theorem, Proof based questions.
Here is a demo of online video lecture. You can watch this complete video on our website Dronstudy
OR
Call us at - 8287971571

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Dronstudy.com

Geometry Teachers Never Spend Time Trying to Find Materials for Your Lessons Again!
Join Our Geometry Teacher Community Today!
http://geometrycoach.com/Geometry-Lesson-Plans/?pa=MOOMOOMATH
This video has a note taking guide that goes along with it. Click here to download the guide
Video Guide
Find the area of a square with a diagonal of 6 units.
The diagonal cuts the square in half creating two 45 45 90 triangles.
The problem involves using the hypotenuse to find the leg length
If you need help in trigonometry I have put together a trigonometry unit. This is one video of the trigonometric unit that contains 14 videos, along with a note taking guide for each video, Click here for the table of contents:
http://www.moomoomath.com/trigonometry-problems.html
You may also enjoy…
Special right triangles in Geometry 30-60-90 45-45-90
https://www.youtube.com/watch?v=nVTtSE5nv7c
Special Right Triangle Explanation
https://www.youtube.com/watch?v=nVTtSE5nv7c
Special right triangles
https://www.youtube.com/watch?v=nVTtSE5nv7c
-~-~~-~~~-~~-~-
Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"
https://www.youtube.com/watch?v=f3bsg8gaSbw
-~-~~-~~~-~~-~-

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MooMoo Math and Science