MathDB
2007 Geometry #7: Convex Quadrilateral

Source:

June 22, 2012
geometrytrigonometrytrig identitiesLaw of Cosines

Problem Statement

Convex quadrilateral ABCDABCD has sides AB=BC=7AB=BC=7, CD=5CD=5, and AD=3AD=3. Given additionally that m∠ABC=60∘m\angle ABC=60^\circ, find BDBD.
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