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Let 4ABC be an isosceles triangle, where the congruent sides are AB and AC. Let M...

Let 4ABC be an isosceles triangle, where the congruent sides are
AB and AC. Let M and N denote points on AB and AC respectively
such that AM ∼= AN. Let H denote the intersection point of MC with
NB. Prove that the triangle 4MNH is isosceles

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