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Triangle

Source: Indian RMO 2005 Problem 5

February 28, 2006
trigonometryexterior angleEq triangle

Problem Statement

In a triangle ABC, D is midpoint of BC . If ∠ADB=45∘\angle ADB = 45 ^{\circ} and ∠ACD=30∘\angle ACD = 30^{\circ}, determine ∠BAD.\angle BAD.
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