2 Rotation:Transformation that turns a figure about a fixed pointCenter of Rotation:The point that the rotation happens aroundAngle of Rotation:How many degrees clockwise or counterclockwise a shape is turned
3 A rotation about a point P through an angle of x° maps every point Q in the plane to a point such that:If Q is not the center of rotation, thenandx°
4 A rotation about a point P through an angle of x° maps every point Q in the plane to a point such that:If Q is the center of rotation, thenQ
5 Example #1: ROTATIONS ON A GRID Consider what you know about rotation, a motion that turns a shape about a point. Does it make any difference if a rotation is clockwise ( ) versus counterclockwise ( )? If so, when does it matter? Are there any circumstances when it does not matter? And are there any situations when the rotated image lies exactly on theoriginal shape?
6 Investigate these questions as you rotate the shapes below about the given point below. Use tracing paper if needed. Be prepared to share your answers to the questions posed above.
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