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Verified answer
Luas Lingkaran = π × r²3.850 = 22/7 × r²
3.850 (7) = 22 × r²
26.950 = 22 × r²
r² = 26.950/22
r = √1.225
r = 35 cm
Maka,
Keliling Lingkaran = 2 × π × r
••••••••• = 2 × 22/7 × 35
••••••••• = 44 × 5
••••••••• = 220 cm
Verified answer
Bangun DatarDiketahui:
L lingkaran = 3850 cm^2
Ditanya:
K lingkaran = ?
Jawab:
L lingkaran = π x r x r
3850 = 22/7 x r x r
3850 x 7/22 = r^2
175 x 7 = r^2
1225 = r^2
r = √1225
r = 35 cm
K lingkaran = 2 π r
= 2 x 22/7 x 35
= 44 x 5
= 220 cm
Jadi, keliling lingkaran tersebut adalah 220 cm.
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