K = 2πR
= 2(22/7(21)
= 2(22(21/7)
= 2(22(3)
= 2(66)
= 132 CM
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K = 2πR
= 2(22/7(21)
= 2(22(21/7)
= 2(22(3)
= 2(66)
= 132 CM