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An equilateral triangle has side 6 cm. What is its circumradius?
A3 root 2 cm
B4 root 3 cm
C3 root 3 cm
D2 root 3 cm
Answer & Solution
Correct answer: D. 2 root 3 cm
R = a/(2 sin 60) = 6/root 3 = 2 root 3 cm.
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