1 12-3 Rotations Warm Up Lesson Presentation Lesson Quiz Holt Geometry

2 Objective Identify and draw rotations.

3 Note 29 A rotation is a transformation that turns a figure around a fixed point, called the center of rotation.

4 Example 1: Identifying RotationsTell whether each transformation appears to be a rotation. Explain. B. A. No; the figure appears to be flipped. Yes; the figure appears to be turned around a point.

5 Check It Out! Example 1 Tell whether each transformation appears to be a rotation. b. a. Yes, the figure appears to be turned around a point. No, the figure appears to be a translation.

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7 Unless otherwise stated, all rotations are counterclockwise.Helpful Hint

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9 Example 3: Drawing Rotations in the Coordinate PlaneRotate ΔJKL with vertices J(4, 3), K(4, –5), and L(–1, 6) by 180°about the origin.

10 Handout worksheet and show how to rotate using patty paper