MathDB

Angle BDC is 24 degrees

Source: India Postal Set 2 P1 2016

January 18, 2017

geometryangleAngle Chasing

Problem Statement

Let

ABCD

be a convex quadrilateral in which \angle BAC = 48^{\circ}, \angle CAD = 66^{\circ}, \angle CBD = \angle DBA.Prove that

\angle BDC = 24^{\circ}