If the circumference of a circle with radius 3.5 cm and centre o is 22 cm . The perimeter of the semi circle is ______
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Step-by-step explanation:
circumference of circle = 2πr
= 2× 22/7 × 3.5
= 2×22/7×35/10
= 44/7×35/10
= 1540/70
= 154/7
= 22cm
~ Hence,the perimeter of semicircle= 22/2
= 11 cm
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