L

1. 9.9 symmetry and reflections
March 07, 2014
Warm Up
Graph the lines
x = 0, y = 2
Objective: identifying symmetry and reflections
May 1­4:31 PM
HW pg. 484 #6­26 evens
1

2. 9.9 symmetry and reflections
March 07, 2014
1.
2.
3.
4.
5.
6.
May 1­4:33 PM
HW pg. 484 #6­26 evens
2

3. 9.9 symmetry and reflections
March 07, 2014
8
7
10
9.
11. A(1, 5) A'(2,7)
12. W(­2, ­6) W'(4,9)
13. S(3, 3) S'(11, 1)
14. D(­9, ­4)
D'(0, 1)
15. (x + 4, y +3)
16. (x + 5, y ­ 2)
17. (x ­ 4, y ­ 1)
18. (x ­ 6, y ­ 2)
May 1­4:39 PM
HW pg. 484 #6­26 evens
3

4. 9.9 symmetry and reflections
March 07, 2014
line of symmetry ­ divides a figure with reflectional symmetry into two congruent halves.
Draw the lines of symmetry. Tell how many there are.
May 1­4:46 PM
HW pg. 484 #6­26 evens
4

5. 9.9 symmetry and reflections
March 07, 2014
Draw all lines of symmetry.
May 1­4:51 PM
HW pg. 484 #6­26 evens
5

6. 9.9 symmetry and reflections
March 07, 2014
Reflection ­ flips a figure over a line of reflection.
The reflected image is congruent to the original figure.
Graph the image of ∆ABC after it is reflected over the y­axis.
B
A C
May 1­4:53 PM
HW pg. 484 #6­26 evens
6

7. 9.9 symmetry and reflections
March 07, 2014
Graph the image of ∆PQR after a reflection over y = 2.
Q
R
P
May 1­4:57 PM
HW pg. 484 #6­26 evens
7

8. 9.9 symmetry and reflections
March 07, 2014
9.9 HW pg. 484 #6­26 evens
May 1­4:59 PM
HW pg. 484 #6­26 evens
8