6. Find the area and perimeter of a circle whose
(i) radius = 14 (ii) diameter = 21 cm.
14 cm
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Radius of a semicircle, r=14cm
Perimeter of a semicircle, P=(π+2)r units
∴P=( 22/7 +2)×14
=( 22/7+14/7)×14
=36/7 ×14=72
Perimeter of the semicircle = 72 cm.
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