# 4.B: Rotations


## 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

## Directions

1. Take notes while watching videos below
2. Go to http://wamap.org and log into our course to complete assignment 4.B with 80% or better.

Rotations [5:47]

### Do

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.

4.B: Rotations is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.