Notes Over 9 - 10 Rotations A _______________is a change of position or size of a figure. transformation turn rotation
Notes Over 9 - 10 Rotations 1. Find the vertices of the image of rRST after a rotation of 90o about the origin. T’ R R’ S’ S T
Notes Over 9 - 10 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
Notes Over 9 - 10 Rotations Judging from appearance, tell whether the figure has rotational symmetry. If so, what is the angle of rotation. 4. Yes o 180
Pg 492 9 – 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
Pg 492 9 – 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)
Pg 492 9 – 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
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’
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
Pg 492 9 – 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
Pg 492 9 – 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
Pg 492 9 – 10 #1 – 11, 12 – 28