lidya88hc
Dik : L 1 = d= 10 cm Jadi r= 5 cm L2 = d= 8cm jadi 5 = 4 cm Dit....... luas daerah yang di arsir???? Jawab= L arsir = L1 - L2 L1 = phi × r × r = 3,14 × 5 × 5 = 78,5 cm² L2 = phi × r × r = 3,14 × 4 × 4 = 50,24 cm² L arsir = L1 - L2 78,5 cm² - 50,24 cm² = 28, 26 cm²
L2 = d= 8cm jadi 5 = 4 cm
Dit....... luas daerah yang di arsir????
Jawab= L arsir = L1 - L2
L1 = phi × r × r
= 3,14 × 5 × 5 = 78,5 cm²
L2 = phi × r × r
= 3,14 × 4 × 4 = 50,24 cm²
L arsir = L1 - L2
78,5 cm² - 50,24 cm² = 28, 26 cm²