What is the perimeter of a sector of a circle whose central angle is 90° and radius is 7 cm?
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perimeter of sector = Φ/360 (2πr) +2r
= 90/360 ( 2*22/7*7)+ 2*7
= 1/4 *44 +14
= 11 + 14 = 25 cm
= 90/360 ( 2*22/7*7)+ 2*7
= 1/4 *44 +14
= 11 + 14 = 25 cm
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