find the area and circumference of semi circle of radius 11 cm plz answer
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area of semicircle= 1/2 ×πr^2
=1/2×22/7×11×11.
= 11/7×11×11
=1331/7= 190.1cm^2
circumference of circle = 1/2×2πr
= 22/7×11
=242/7= 34.5cm
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