Mensurationmedium · Past Paper
If the area of an equilateral triangle is 9*sqrt(3) sq. cm, find its perimeter.
A18 cm
B6 cm
C12 cm
D24 cm
✓ Correct Answer: A — 18 cm
Area = (sqrt(3)/4)*a^2 = 9*sqrt(3) implies a^2 = 36, so side a = 6. Perimeter = 3 * 6 = 18 cm.
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