the perimeter of a semicircle is 72 cm find its area where π = 22/7
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Answer:
Area of semicircle = 308 cm^2
Step-by-step explanation:
perimeter = 72 cm
(π+2)r = 72
( 22/7 + 2 )r = 72
( 22+14/7 )r = 72
r = 72 * 7/36
r = 14 cm
So, area = 1/2πr^2
= 1/2 * 22/7 * 14 * 14
= 308 cm^2
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