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Answer:
A = 60°
B = 60°
C = 60°
Step-by-step explanation:
AO = BO = CO (All are radius of the circle)
∠BOC = 360 - 120+120 = 120°
therefore by isocelus triangle property we conclude that,
∠OAB = ∠OAC = ∠OCA = ∠OCB = ∠OBA = ∠OBC = x
x+x+120 = 180°
2x = 60
x = 30°
therefore ,
∠A = 30 + 30 = 60°
∠B = 30 + 30 = 60°
∠C = 30 + 30 = 60°
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