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CEMC Gauss (Grade 8), 2002

Geometry Difficulty 3.0 AMC 10/12 Find the answer Canada

In the diagram, $\angle ABD = \angle BDC$ and $\angle DAB = 80^\circ$ . Also, $AB = AD$ and $DB = DC$ . The measure of $\angle BCD$ is

(A) $65^\circ$ (B) $50^\circ$ (C) $80^\circ$ (D) $60^\circ$ (E) $70^\circ$

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