tentukan "keliling" dan "luas" lingkaran di atas
Diketahui:
- d = 14 cm
- r = d/2 = 14/2 = 7 cm
- π = 22/7
Ditanyakan:
- K = ... cm?
- L = .... cm²?
Penyelesaian:
- Keliling
K = 2πr
K = 2 × 22/7 × 7
K = 2 × 22
K = 44 cm
- Luas
L = πr²
L = 22/7 × 7 × 7
L = 22 × 7
L = 154 cm²
