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Activity 3.8
Assignment 3.10
Rotational Symmetry
Objectives
Identify polygons with rotational symmetry.
Calculate measures of rotations of regular polygons.
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Assignment 3.9
About Geometry Worksheet Assignment 3.10:
Assignment 3.10 is an introduction to rotational symmetry of polygons.
Prerequisite Skills: Identify rotations of polygons (Assignment 3.9).
Definition: A polygon has rotational symmetry if an image of the polygon can be rotated about a center point less than 360 to coincide with the polygon.
Theorems: Regular polygons have rotational symmetry.
The measure through which a regular polygon can be rotated to coincide with itself is a multiple of the measure of its central angle.