Piece of wire of length hundred and 8 cm is bent to form a semicircular arc bounded by its diameter find its radius and area enclosed
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circumference of circle +diameter =total length of wire
πr+2r=108
so r=21
now area of semicircle where r =21
πr^2/2 =693
πr+2r=108
so r=21
now area of semicircle where r =21
πr^2/2 =693
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