AG

1
Z
Warm Up
W
12
7.5
U
5
V
X
Y
6
XYZ
5/6
10
9
100
2
Proving Triangles Similar
3
Angle-Angle (AA) Similarity Postulate If two
angles of one triangle are congruent to two
angles of another triangle, then the two
triangles are similar.
D
A
E
F
B
C
4
Side-Side-Side (SSS) Similarity THM If the
corresponding sides of two triangles are
proportional, then the triangles are similar.
D
A
E
F
B
C
5
Side-Angle-Side (SAS) Similarity THM If the
lengths of two sides are proportional and the
included angle is congruent, then the triangles
are similar
D
A
F
E
B
C
6
Ex. Determine whether the triangles are
similar. If so, tell which similarity test is
used and complete the statement.
Yes, AA
M
G
68
43
68
43
H
F
L
K
V
Y
NO
7
3
Z
5
X
W
U
11
7
Prove that RST PSQ
1. Two sides are proportional 2. Included angle
is congruent
SAS
8
Classwork