7.2 Review Worksheet (continued)
Given that pentagon ABCDE ~ pentagon FGHJK , find each of the following. 14. perimeter of pentagon FGHJK
E
90 m
A
K
60 m
F
P = 381 m A = 1944 m 2
15. area of pentagon FGHJK
D
J
B
G
H
C
7.2.3 Dilations and Similarity in the Coordinate Plane 16. A promoter produced this design for a street festival. She now wants to make the design smaller to use on postcards. Sketch the design after a dilation with scale factor 1 2 . . y 8
4
x
0
8
4
17. Given that △ UOV ~ △ XOY , find the coordinates of X and the scale factor.
18. Given that △ MON ~ △ KOL , find the coordinates of K and the scale factor.
y
y
U (–9, 0)
O
X
x
M (0, 16)
V (0, –3) Y (0, –8)
K
x
O
N (–24, 0)
A (–15, 0)
50
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