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JAWAB
r = 14 dm
d = 2×r = 2×14 dm = 28 dm
Keliling = π × d = (22/7) × 28 dm = 22 × 4 dm = 88 dm
diketahui r = 14
D = 28
rumus keliling adalah π.D
(22/7).28
22.4
88dm