Keliling sebuah taman bunga berbentuk lingkaran adalah 176 meter. Berapa m² luas taman bunga tersebut ?
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Keliling = 2πr
176 = 2 × 22/7 × r
176 = 44/7 × r
r = 176 ÷ 44/7
r = 176 × 7/44
r = 28 m
Luas
= πr²
= 22/7 × 28²
= 227 × 784
= 2.464 m²
diketahui kll = 176 m
ditanya : d=...
jawab:
kll = π x d
d = kll/ π
= 176
22/7
= 176 x 7
22
= 1232/22
= 56 m
jadi diameter lingkaran 56 meters
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