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r = K / 2π
= 132 / 2x22/7
= 132 x 7 / 44
= 3 x 7
= 21 cm
Jadi jari"nya yaitu 21 cm
132 = 2 π r
132/2 = π r
66 = π r
66 = 22/7 x r
66/(22/7) = r
66x7/22 = r
21 = r
r = 21 cm