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The radius of a sector is 21 cm and it central angle is 120 find the perimeter of sector |
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Answer» answer 44 explanation circumference=2×(22/7)×r here,r=21 so,circumference=44/7×21 =132 C of SECTOR=(angle/360)×total c =(120÷360)×132 =132÷3 =44 |
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