82 Similar Polygons

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8-2Similar Polygons

• Two Key Terms
• One Concept

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Key Terms

• Two figures that have the same shape but not
  necessarily the same size.
• The ratio of the lengths of corresponding sides.

• Similar ()
• Similarity ratio

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Similar Polygons

• Two polygons are similar if

• corresponding angles are congruent
• corresponding sides are proportional

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1 Understanding Similarity
B
C
A
D
F
G
E
H
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2 Determine Similarity
Y
12
14
X
Z
16
N
21
18
P
M
24
6
3 Using Similar Figures
O
N
3.2
2
Find the value of y.
M
L
5
x
T
S
y
Q
R
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