1. Warm-Up
Graph the image of the polygon with vertices A(0,2), B(-2,-3), C(2, -3) after a dilation centered at the origin with a scale factor of 2.

2. Chapter 9 Review
Column Races

3. #Practice
What is 2+2? 3 4 5

4. #1
The figure has rotational symmetry. What is the order of the symmetry? 2 6 12

5. #2
The figure has rotational symmetry. What is the magnitude of the symmetry?
45°
90°
360°

6. #3
What is the scale factor of the dilation about the origin? 2 3

7. #4
What is the scale factor of the dilation about the origin? 2 3

8. #5
What is the scale factor of the dilation about the origin?
1/3

9. #6
Point E with coordinates (5, 7) is translated along a glide reflection to its image of E'(–7, 9). Which best describes the glide reflection? translation along 〈2, 2〉 and reflection in x-axis translation along 〈–13, 2〉 and reflection in x-axis translation along 〈2, 2〉 and reflection in y-axis

10. #7
Name the image of BC after
its reflected across line m. BC AC AB

11. #8
An isometry maps a figure to a congruent figure.
True
False

12. #9
What is the image of X(3, 5) along the translation
vector 〈–4, 6〉?
X′(7, 11)
X′(–1, –1)
X′(–1, 11)

13. #10
Point K(–2, 1) is rotated 90° counterclockwise
about the origin. What are the coordinates of K′?
K′(2, –1)
K′(–1, 2)
K′(–1, –2)

14. #11
The point Y with coordinates (–8, 6) is rotated counterclockwise about the origin to Y'(8, –6). How many degrees was the point rotated? 90
180
270

15. #12
Find the coordinates of X′ with X(6, 5) for a dilation
centered at the origin with a scale factor of 2.
X′(–10, –12)
X′(10, 12)
X′(12, 10)

16. 72° 36° 30° #13 Find the magnitude of the rotational symmetry in
a regular pentagon.
72°
36°
30°

17. BC CD DE #14 Use the figure below to determine which segment
represents a 90o clockwise rotation of AB about P. BC CD DE

18. C E F #15 The regular octagon below forms eight congruent triangles.
A clockwise rotation of 45 about P maps D onto: C E F P A B C D E F G H

19. ∆FPG ∆DPE ∆CPD #16 The regular octagon below forms eight
congruent triangles.
A clockwise rotation of 180 about P maps BPC onto:
∆FPG
∆DPE
∆CPD P A B C D E F G H

20. B E F #17 The regular octagon below forms eight congruent triangles.
A counterclockwise rotation of 90 about P maps D onto: B E F P A B C D E F G H

21. A B C #18 The regular octagon below forms eight congruent triangles.
A counterclockwise rotation of 135 about P
maps D onto: A B C P A B C D E F G H

22. Homework:
Finish the review sheet
Chapter 9 Test tomorrow!!