1. Notes Over Rotations
A _______________is a change of position or size of a figure.
transformation
turn
rotation

2. Notes Over Rotations
1. Find the vertices of the image of rRST after a rotation of 90o about the origin. T’ R R’ S’ S T

3. Notes Over Rotations
Judging from appearance, tell whether the figure has rotational symmetry. If so, what is the angle of rotation. 2. 3.
No Rotational
symmetry
Yes o
180

4. Notes Over Rotations
Judging from appearance, tell whether the figure has rotational symmetry. If so, what is the angle of rotation. 4.
Yes o
180

5. Pg – 10 #1 – 11, 12 – 28
Each figure below is an image formed by rotating the figure at the right. What is each angle of rotation? 1. 2. 3. o o
180 o 90
270

6. Pg – 10 #1 – 11, 12 – 28
Graph each point. Then rotate it the given number of degrees about the origin. What are the coordinates of the image?
4. A(5, 5); 90o A’ A
A’(- 5, 5)

7. Pg – 10 #1 – 11, 12 – 28
Graph each point. Then rotate it the given number of degrees about the origin. What are the coordinates of the image?
5. B(0, - 2); 180o
B’(0, 2) B’ B

8. Pg 492 9 – 10 #1 – 11, 12 – 28 C’(- 2, - 4) 6. C(2, 4); 180o C C’
Graph each point. Then rotate it the given number of degrees about the origin. What are the coordinates of the image?
6. C(2, 4); 180o C
C’(- 2, - 4) C’

9. Pg 492 9 – 10 #1 – 11, 12 – 28 C’(3, - 1) 7. D(- 1, - 3); 90o D’ D
Graph each point. Then rotate it the given number of degrees about the origin. What are the coordinates of the image?
7. D(- 1, - 3); 90o
C’(3, - 1) D’ D

10. Pg – 10 #1 – 11, 12 – 28
Judging from appearance, tell whether each figure has rotational symmetry. If so, what is the angle of rotation? 9. 8. o 90 o
Yes
Yes 60

11. Pg – 10 #1 – 11, 12 – 28
Judging from appearance, tell whether each figure has rotational symmetry. If so, what is the angle of rotation?
10.
11. o
Yes 60 No

12. Pg – 10 #1 – 11, 12 – 28