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Keliling lingkaram yang jari jari 18 cm adalah
diketahui
r = 18 cm
ditanya
keliling
jawab
2πr
2 x 3,14 x 18
2 x 56,52
113,04 cm
SOAL 1
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Cara 1 :
K = 2 × π × r
K = 2 × 3,14 × 18
K = 2 × 56,
K = 113,04 cm
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Cara 2 :
K = π × d
K = 3,14 × 36
K = 113,04 cm
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