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9.3 Rotations

9.3 Rotations. Rotations. A rotation is a transformation that turns every point of the preimage through a specified angle and direction. The fixed point is the center of rotation . The degree of the turn is the angle of rotation. Rotations Using Reflections.

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9.3 Rotations

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  1. 9.3Rotations

  2. Rotations • A rotation is a transformation that turns every point of the preimage through a specified angle and direction. • The fixed point is the center of rotation. • The degree of the turn is the angle of rotation.

  3. Rotations Using Reflections • A rotation can be performed by reflecting a figure in 2 INTERSECTING lines • The angle of rotation is twice the measure of the acute or right angle formed by the intersecting lines. • Reflecting an image in 2 perpendicular lines creates a 180 degree rotation.

  4. Rotations in the Coordinate Plane • Rotations in the coordinate plane will be done in either 90, 180 or 270 degrees, clockwise or counterclockwise. • Notice: • 900ccw = 2700cw • 2700cw = 900ccw • 1800ccw = 1800 cw

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