8.G.A.8.G.A.In this video lesson, we will learn the definition of similar figures. Similar figures are figures that are the same shape but different sizes. Similar figures have corresponding sides that are proportional and corresponding angles that are congruent. We will learn how to identify corresponding sides and angles and how to use a proportion to determine if figures are similar. We will also learn how to use a proportion to find a missing side length given that two figures are similar. We will also learn why it is important to enlarge or reduce an image proportionally to avoid distorting the image. Student practice is embedded in the video and exemplar solutions are modeled and explained.
Website: www.magicofmath1.com
TPT Resources: https://www.teacherspayteachers.com/Store/The-Magic-Of-Math-Through-Instruction
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Grade 8 Transformations Unit Playlist - https://youtube.com/playlist?list=PLIa7w81Zp_7yZLCLoAZm5qPJ9McYBLKLD
💗 Preparing for the Unit - Review The Coordinate Plane and Graphing
https://youtu.be/y2Vs6WU6AoU
💗Congruent Figures - How to Define and Identify
https://youtu.be/hqX6SvfgGBo
💗Translations - The Mathematical Slide
https://youtu.be/SOwRZCCluA4
💗Reflections - The Mathematical Flip
https://youtu.be/-T9EUgMIpyI
💗Rotations - The Mathematical Turn
About the Origin - https://youtu.be/6GZ3G61K6-A
About a Vertex/Point
https://youtu.be/juTXuJ54Zik
💗Similar Figure - How to Define, Identify & Use
https://youtu.be/Nz4gKXeZOyU
💗Dilations - The Mathematical Change in Size
https://youtu.be/E8lrJnuI0As
💙REVIEW - Similar Figures & Dilations (Pear Deck/Google Slides)
https://docs.google.com/presentation/d/1oWMgIsPTsMWxF8z8hFLOaPpfjP3QY-5qz1_2Mzc58D8/edit?usp=sharing
00:00 Introduction
00:36 Similar Figures - Definition
00:55 How to Determine Similar Figures
03:14 Similar or Not? ~Distorted Images
04:26 Student Practice #1 - Which Two are Similar?
07:00 Using Similarity to Find a Missing Side Length
08:12 Student Practice #2 Find the Missing Side Length
09:21 Student Practice #3 Real World Application
Common Core Math Standard
Geometry 8.G.A. 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.