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124_G6U25_WB_˙—» ¿º 2011.6.23 3:32 PM ˘ ` 21
124-P4-1
1. AB CD, find the unknown angle.
30 B
Aa D
C 70
2. DE FG, find the unknown angle.
A
a
D 70 E
CG
115
FB
124-P4-1
1. AB CD, find the unknown angle.
30 B
Aa D
C 70
2. DE FG, find the unknown angle.
A
a
D 70 E
CG
115
FB