A circle with center D is drawn inside in a circle with center C, as shown. If C...【小站备考】

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A circle with center D is drawn inside in a circle with center C, as shown. If CD = 3, what is the area of semicircle EAB ?

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A. $\frac{9}{2}$ π

B.9π

C.12π

D.18π

E.36π

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