Similar Figures Notes
Figures that are similar (______) have the same shape by not necessarily the same size.
Definition
Two polygons are similar polygons if and only if their corresponding angles are congruent AND their
corresponding sides are proportional.
Example 1
Similarity
Statement
Diagram
E
A
B
6
5
12
Corresponding Sides
Corresponding Angles
F
10
10.8
5.4
D
4
C
H
G
8
X
S
9
13.5
9
Q
18
Z
6
12
Y
R
A similarity ratio is the ratio of the lengths of the corresponding sides of two similar polygons.
The similarity ratio of ABC to DEF is __________ or __________.
The similarity ratio of DEF to ABC is __________ or __________.