GAUSS7 2000 Problem 19

Past Contests GAUSS7 GAUSS (GR. 7) - 2000
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1

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

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Answer Choices
A. 4.5\:cm^2
B. 8\:cm^2
C. 12.5\:cm^2
D. 16\:cm^2
E. 17\:cm^2