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CEMC Gauss (Grade 8), 2007

Geometry Difficulty 2.0 Junior Find the answer Canada

In the diagram, $AD = BD = CD$ and $\angle BCA = 40^\circ$ . The size of $\angle BAC$ is

(A) $80^\circ$ (B) $120^\circ$ (C) $60^\circ$ (D) $90^\circ$ (E) $100^\circ$

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