carilah luas diameter 12cm carilah luas diameter 16cm carilah luas jari2 10cm carilah luas jari2 7cm

Lingkaran

A.
r = 12/2 = 6 cm

L = πr² = 3,14.6² = 113,04 cm²

B.
r = 16/2 = 8 cm

L = πr² = 3,14.8² = 200,96 cm²

C.
r = 10 cm

L = πr² = 3,14.10² = 314 cm²

D.
r = 7 cm

L = πr² = 22/7 × 7² = 154 cm²

semoga berguna +_+