CEMC Cayley, 2003

Geometry Difficulty 3.0 AMC 10/12 Find the answer Canada

In the diagram, $ABCD$ is a square with a side length of 10. If $AY = CX = 8$ , the area of the shaded region is

(A) $16$ (B) $20$ (C) $40$ (D) $48$ (E) $24$

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