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124_G6U25_WB_˙—» ¿º 2011.6.23 3:32 PM ˘ ` 9
124-B5-1
The Unknown Angle
1. Find the measure of the unknown angle. AB CD
Example
A 36 B A 36 B
36 D
a 44
C 44 D C 44
a. b.
A 50 B A B
a 35 D
a
C 60 D
C 55
c. d.
A B A 30 B
40
90
100
Ca D C aD
124-B5-1
The Unknown Angle
1. Find the measure of the unknown angle. AB CD
Example
A 36 B A 36 B
36 D
a 44
C 44 D C 44
a. b.
A 50 B A B
a 35 D
a
C 60 D
C 55
c. d.
A B A 30 B
40
90
100
Ca D C aD
