Geometryhard · Past Paper
The area of the circumcircle of an equilateral triangle with side 6 is:
A12 pi
B36 pi
C9 pi
D18 pi
✓ Correct Answer: A — 12 pi
R = a/sqrt(3) = 6/sqrt(3) = 2 sqrt(3). Area = pi * R^2 = pi * (2 sqrt(3))^2 = 12 pi.
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