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124_G6U25_WB_˙—» ¿º 2011.6.23 3:32 PM ˘ ` 10
124-B5-2
2. Find the measure of the unknown angle. AB CD
Example
A B A B
30 D
30
100 D C a
Ca
a. 70 B b. a
30 60 D A B
A a C 80
C 100
60
D
124-B5-2
2. Find the measure of the unknown angle. AB CD
Example
A B A B
30 D
30
100 D C a
Ca
a. 70 B b. a
30 60 D A B
A a C 80
C 100
60
D
