Mensurationmedium · Past Paper
If the perimeter of a semi-circle is 36 cm, what is its area?
A77 sq. cm
B154 sq. cm
C308 sq. cm
D44 sq. cm
✓ Correct Answer: A — 77 sq. cm
Perimeter = pi*r + 2r = 36. r(22/7 + 2) = 36. r(36/7) = 36. r=7. Area = 0.5 * 154 = 77.
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