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CEMC Gauss (Grade 7), 2000

Geometry Difficulty 2.0 Junior Find the answer Canada

The diagram shows two isosceles right-triangles with sides as marked. What is the area of the shaded region?

(A) $4.5$ cm $^2$ (B) $8$ cm $^2$ (C) $12.5$ cm $^2$ (D) $16$ cm $^2$ (E) $17$ cm $^2$

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