in the figure, O is the centre of the circle . what is the measure of angle ACB
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Answer :- Measure of ∠ACB = 80°
Explanation :-
O is the centre of the Circle
In ∆ AOC
OA = OC
Therefore, ∠OAC = ∠OCA
∠OAC + ∠OCA + ∠AOC = 180°
∠OAC = ∠OCA = 30°
In ∆ OBC
OB = OC
∠OBC = ∠OCB = 50°
∠ACB = 50° + 30° = 80°
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