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If the circle with center \(O\) has area \(9\pi,\) what is area of equilateral triangle \(ABC?\)

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If the circle with center \(O\) has area \(9\pi,\) what is area of equilateral triangle \(ABC?\)

A. \(9\sqrt3\)
B. \(18\)
C. \(12\sqrt3\)
D. \(24\)
E. \(16\sqrt3\)

Answer: C

Source: Magoosh
Source: — Problem Solving |