Geometryhard · Past Paper
If an equilateral triangle is inscribed in a circle of radius r, what is the side of the triangle?
Ar
Br * sqrt(2)
Cr * sqrt(3)
D2r
✓ Correct Answer: C — r * sqrt(3)
The circumradius of an equilateral triangle is s/sqrt(3), so s = r * sqrt(3).
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