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CEMC Gauss (Grade 8), 2003

Geometry Difficulty 2.0 Junior Find the answer Canada

In the diagram, triangle $ABC$ is isosceles, with $AB=AC$ . If $\angle ABC=50^\circ$ and $\angle DAC=60^\circ$ , the value of $x$ is

(A) $70$ (B) $50$ (C) $80$ (D) $60$ (E) $30$

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