answer the following question
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Angle BOC + Angle AOD = 280
We know that vertically opposite angles are equal ,
angle BOC+angle AOD = 280
2( Angle BOC) =280
Angle BOC = 140
angle BOC + angle AOC = 180 ( by liner pair)
140 + angle AOC =180
angle AOC =180 -140
Angle AOC = 40
Angle AOC = Angle BOD=40
(by vertically opposite angle)
angle AOC=40
Angle COB=140
angle BOD=40
angle COB = 140
angle AOD = 40
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