MathDB
Isosceles triangle

Source: JBMO Shortlist 2002

November 12, 2008
geometrygeometry proposed

Problem Statement

Let ABC ABC be an isosceles triangle with AB\equal{}AC and \angle A\equal{}20^\circ. On the side AC AC consider point D D such that AD\equal{}BC. Find ∠BDC \angle BDC.
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