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in Circles by (56.3k points)

In figure, two congruent circles with centres O and O’ intersect at A and B. If ∠AO’B = 50°, then find ∠APB.

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As we are given that, both the triangle are congruent which means their corresponding angles are equal. 

Therefore, ∠AOB = AO’B = 50°

Now, by degree measure theorem, we have 

∠APB = ∠AOB/2 = 25°

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