Turn the class around. Scholars define rotations of multiples of 90 degrees and create algebraic mappings for them. After an introduction to symmetry, pupils determine which letters of the alphabet have rotational and reflectional symmetry. Individuals practice performing rotations on the coordinate plane.

Concepts

rotations, angle of rotation, coordinate plane, rotational symmetry, symmetry, transformations

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Instructional Ideas

• Challenge the class to determine how to rotate about a point other than the origin

Classroom Considerations

• Fits as the third lesson in a Transformation Unit with four parts
• Rotations are counterclockwise about the origin

• This video is hosted on YouTube

Pros

• Worksheet includes coordinate planes to perform rotations
• Contains an additional set of problems for those needing extra work toward mastery

Cons

• None

Common Core

HSG-CO.A.2 HSG-CO.A.5