if the area of a semi circular region is 77m^2,find its perimeter
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area of semi circle= π×r²/2
77=π×r²/2
77=(22/7)×r²/2
r²=77×7/22
r²=(7×7)/(2×2)
r²=49/4
r=√(49/4)
r=7/2 m
perimeter of semicircle= 2πr/2 + 2r
=πr+d
=(22/7)(7/2)+2×7/2
=11+7
=18 m
77=π×r²/2
77=(22/7)×r²/2
r²=77×7/22
r²=(7×7)/(2×2)
r²=49/4
r=√(49/4)
r=7/2 m
perimeter of semicircle= 2πr/2 + 2r
=πr+d
=(22/7)(7/2)+2×7/2
=11+7
=18 m
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