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K= 44 cm
Ditanya= L?
K= πd
44= 22/7 x d
d= 44/22/7
d= 44 x 7/22
d= 14 cm > r= 7 cm
L= πr²
L= 22/7 x 7 x 7
L= 22 x 7
L= 154 cm²
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Verified answer
Mapel : MatematikaBab : Bangun Datar
Diketahui :
- Keliling Lingkaran = 44 cm
Ditanya :
- Luas Lingkaran = ......?
Penyelesaian :
- Jari - Jari :
K = 2 × π × r
44 cm = 2 × 22/7 × r
44 cm = 44/7r
r = 44 cm × 7/44
r = 7 cm
- Luas Lingkaran :
L = π × r × r
L = 22/7 × 7 cm × 7 cm
L = 22 cm × 7 cm
L = 154 cm²
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