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 Rotations
Tell 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.

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

9. Example 3: Drawing Rotations in the Coordinate Plane
Rotate 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