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=13.200cm /100
= 132cm
2 π r =keliling
2 x22/7 x r = 132
44/7x r = 132
r = 132 x 7/44
r =21cm
132 m = Keliling * 100
Keliling = 132/100 =1.32 m
22/7 * d = 1.32 m
d= 1.32 * 7/22 = 0.06*7 = 0.42 m
Jari jari = d/2 = 0.42 / 2 = 0.21 m..(atau 21 cm)