find the perimeter of the following figure 21 CM
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Radius of a circle, r = 21 cm
Perimeter of a quadrant, P=( 2π +2)r units
=( 7×2/22+2)×21
=( 14/22 +2)×21
P=( 14/22+28)×21
= 14/50 ×21
=75cm.
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