More Lessons for Grade 9
Examples, solutions, videos, worksheets, games, and activities to help Geometry students learn about transformations on the coordinate plane. In this lesson, we will look at rotation.
A rotation is an isometric transformation: the original figure and the image are congruent. The orientation of the image also stays the same, unlike reflections. To perform a geometry rotation, we first need to know the point of rotation, the angle of rotation, and a direction (either clockwise or counterclockwise). A rotation is also the same as a composition of reflections over intersecting lines.
Describing and drawing rotations of simple shapes in the plane.
Geometric Transformations - Rotations
This video reviews the rules used for rotating figures in a coordinate plane about the origin. At the 10:20 mark, there is a shortcut demonstrated that can be used to as an alternative method.
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