Sebuah lingkaran berdiameter 42 cm. tentukanlah: a. jari-jarinya b. kelilingnya c. luasnya
mileniawati
A . r = d ÷ 2 = 42 ÷ 2 = 21cm b. K = πd K = 22/7 × 42 K = 132 cm c. L = πr² L = 22/7 × 21² L = 22/7 × 21× 21 L = 1386 cm²
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DethaViana
Sebuah lingkaran berdiameter 42 cm a. Jari-jari = 21 cm b. Keliling = π × d K = 22/7 × 42 cm K = 132 cm c Luas = π × r × r L = 22/7 × 21 cm ×21 cm L = 1.386 cm²
b. K = πd
K = 22/7 × 42
K = 132 cm
c. L = πr²
L = 22/7 × 21²
L = 22/7 × 21× 21
L = 1386 cm²
a. Jari-jari = 21 cm
b. Keliling = π × d
K = 22/7 × 42 cm
K = 132 cm
c Luas = π × r × r
L = 22/7 × 21 cm ×21 cm
L = 1.386 cm²