1. Warm Up
Tell whether the shaded figure is a reflection of the non-shaded figure

2. Lesson 3-3: Rotations I can: Vocabulary:
Define and identify rotations.
Identify corresponding sides.
Understand prime notation to describe an image after a rotation.
Identify center of rotation.
Identify direction and degrees of a rotation.
Vocabulary:
Rotations
Angle of Rotation
Center of Rotation

3. Rotations (Turns)
A transformation in which a figure is rotated about a point called the center of rotation.

4. Angle of Rotation The number of degrees a figure rotates.
90 Degree Turn

5. Center of Rotation
The point in which a figure is rotated.

6. Rotation Click the triangle to see rotation
Turning a figure around a point or a vertex
Rotation

7. Clockwise Rotations
90 Degree Rotation:
180 Degree Rotation:

8. Counter-Clockwise Rotations
90 Degree Rotation:
180 Degree Rotation:

9. Same length; rotated 90 degrees clockwise Lines are not parallel
Rotations of Lines
A line that rotates remains the same length, but will not necessarily remain parallel.
Same length; rotated 90 degrees clockwise Lines are not parallel

10. Same degree measure; rotated 90 degrees counter-clockwise
Rotations of Angles
Angles that are rotated will remain the same degree measure.
Same degree measure; rotated 90 degrees counter-clockwise

11. 180 Degree Clockwise Rotation