Download Geometry Section 8.4 Similar Triangles AngleAngle (AA) Similarity

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Geometry ­ Section 8.4
Similar Triangles
L
Angle­Angle (AA) Similarity Postulate
If two angles of one triangle are congruent to two angles of another triangle, then the two triangles are similar.
X
J
If J X and K Y, then JKL ~
XYZ.
1. Are the triangles similar?
Write a similarity statement.
Z
Y
K
B
E
6
C
6
4
A
68
D
Write a statement of portionality.
Find the measure of A.
Find the measure of the angles at C.
Find the length of CE.
.
1
The following triangles are similar. List the pairs of congruent angles and find the value of x.
B
E
2.
3.
N
x
30
M
20
F
A
C
15
D
L
K x
J
16
Determine whether the triangles can be proved similar. If they are similar, write a similarity statement. If they ae not similar, explain why.
Q
4.
X
5.
R
80
Y
P
W
V
T
S
60
25
Z
6.
A
B
C
D
E
Homework:
Page: 483
Problems: 2­46
2
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