4.B: Rotations

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Jan 11, 2020
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- 4.A: Reflections and Translations
- 4.C: Dilations

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Overview

The purpose of this lesson is to learn how to rotate shapes.

This lesson will address the following CCRS Standard(s) for Geometry:

8.G.2: Understand that a two-dimensional figure is congruent to another if the second can be obtained from the first by a sequence of rotations, reflections, and translations; given two congruent figures, describe a sequence that exhibits the congruence between them

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Go to http://wamap.org and log into our course to complete assignment 4.B with 80% or better.

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Rotations [5:47]

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Complete assignment 4.B with 80% or better at http://wamap.org

Summary

In this lesson we have learned:

Rotations turn each point around a given point at a given angle
- Rotating 90 degrees shifts the point (x,y) to (-y,x)
- Rotating 180 degrees shifts the point (x,y) to (-x,-y)
- Rotating 270 degrees shifts the point (x,y) to (y,-x)
The resulting shape is still congruent to the original shape
Rotations, Reflections, and Translations can be combined to create various congruent shapes.

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