The circumference of semicircle is 72 cm.find it's area.
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2πr/2 + 2r = 72
πr + 2r = 72
r = 72/π + 2
r = 72/(22/7 + 2)
r = 14m Ans.
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circumference of a semi circle
2πr/2 + 2r = 72 cm
πr + 2r = 72 cm
r = 72/π + 2
r = 72/(22/7+2)
r = 14 cm
area of a circle
= πr²/2
= (22/7×14×14)/2
= 308 cm²
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