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Bab : Bangun Datar
Diketahui :
- Keliling Lingkaran (K) = 154
Ditanya :
- Jari - Jari Lingkaran (r) = .....?
Penyelesaian :
- Jari - Jari Lingkaran (r) :
K = 2 × π × r
r = K ÷ (2 × π)
r = 154 ÷ (2 × 22/7)
r = 154 ÷ 44/7
r = 154 × 7/44
r = 3,5 × 7
r = 24,5
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