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In a ΔABC, it is given that AB = AC and the bisectors of ∠B and ∠C intersect at O. If M is a point on BO produced, prove that ∠MOC = ∠ABC.

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Given that in, ΔABC

AB=AC and the bisector of ∠B and ∠C intersect at O and M is a point on BO produced

We have to prove ∠MOC=∠ABC


AB=AC ⇒ ΔABC is isosceles

⇒ ∠B = ∠C (or) ∠ABC=∠ACB


BO and CO are bisectors of ∠ABC and ∠ACB respectively

Equating (2) and (3)

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