Rotations of 180 Degrees

Download

A little background

To get an overall sense of the module this lesson is a part of, see the Module Overview
To get an overall sense of the topic this lesson is a part of, see the Topic Overview
This learning for the module this lesson falls under is assessed through the Mid-Module Assessment and the End-of-Module assessment
You may be interested in other topics and lessons in this module

Objectives

Students learn that a rotation of 180 degrees moves a point on the coordinate plane (a,b) to (-a, -b).
Students learn that a rotation of 180 degrees around a point, not on the line, produces a line parallel to the given line.

Prior Knowledge

LinesParallel
Geometry2-D Shapes
GeometryAngles

45 mins Overhead projector transparencies (1 / student), Fine point dry - erase markers (1 / student), Felt cloth or other eraser (1 / or pair) 8.G.A.1

EngagyNY Curriculum by engageny, used under CC-BY-SA 3.0