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UKMT Junior Mathematical Challenge, 2016

Geometry Difficulty 2.0 Junior Find the answer United Kingdom

The diagram shows a pentagon drawn on a square grid. All vertices of the pentagon and triangle are grid points. What fraction of the area of the pentagon is shaded?

(A) $\frac{2}{7}$ (B) $\frac{1}{3}$ (C) $\frac{2}{5}$ (D) $\frac{1}{4}$ (E) $\frac{2}{9}$

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