Question

calcule a area do circulo que tem diametro igual a 30 cm​

Answer 1

d = 2r

30 = 2r

30/2 = r

15 = r

a = πr²

a = 3,14 . 15²

a = 3,14 . 225

a = 706,5 cm²

Answer 2

D = 30 ⇒ r = 15

A = πr²

A = π.15²

A ≈ 3,14.225

A ≈ 706,5 cm²