1.

O is the centre of the circle.Given that ∠OAB = 20∘, ∠OCB = 55∘. Find ∠BOC and ∠AOC in degree. ​ ___

Answer»

O is the centre of the circle.Given that ∠OAB = 20∘, ∠OCB = 55∘. Find ∠BOC and ∠AOC in degree.
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