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CEMC Gauss (Grade 8), 2003

Geometry Difficulty 3.0 AMC 10/12 Find the answer Canada

In the diagram, $ABCD$ is a square with area $25\text{ cm}^2$ . If $PQCD$ is a rhombus with area $20\text{ cm}^2$ , the area of the shaded region, in $\text{cm}^2$ , is

(A) $12$ (B) $10$ (C) $11$ (D) $12.5$ (E) $9$

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