126°=C+D+E
126=3
C=42°
D=42°
E=42°
AOB = 42×2 = 84 (pusat)
AOB+ACB
84+42 = 126°
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126°=C+D+E
126=3
C=42°
D=42°
E=42°
AOB = 42×2 = 84 (pusat)
AOB+ACB
84+42 = 126°