Finallyd the perimeter and area of a semi - circle whose diameter is 18.2 cm
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diameter = 18.2 cm
radius = 9.1 cm
perimeter of semi circle
= πr + d
= ( 22/7 x 9.1 ) + 18.2
= ( 22 x 1.3 ) + 18.2
= 28.6 + 18.2
= 46.8 cm
area of semi circle
= πr^2 / 2
= ( 22/7 x 9.1 x 9.1 ) / 2
= 130.13 cm^2
radius = 9.1 cm
perimeter of semi circle
= πr + d
= ( 22/7 x 9.1 ) + 18.2
= ( 22 x 1.3 ) + 18.2
= 28.6 + 18.2
= 46.8 cm
area of semi circle
= πr^2 / 2
= ( 22/7 x 9.1 x 9.1 ) / 2
= 130.13 cm^2
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