The figure shown above consists of three identical circles that are tangent to each other.
If the area of the shaded region is 64~$\sqrt{3}$~-32π , what is the radius of each circle?
4
8
16
24
32
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等边三角形S=1/2*ah h=1/2* 根号3*a, 所以S=1/4*根号3*a*a
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等边三角形S=1/2*ah h=1/2* 根号3*a, 所以S=1/4*根号3*a*a
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