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Angle BAC = 2 of angle BOC=100
OB =OC Therefore angle obc = ocb =x
by angle sum property ,
angle obc + angle BOC + angle ocb = 180
100 + x + x = 180
2x =80
x =40
OB =OC Therefore angle obc = ocb =x
by angle sum property ,
angle obc + angle BOC + angle ocb = 180
100 + x + x = 180
2x =80
x =40
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