Question

Calcule a área dos círculos dados: B) diâmetro= 6 cm π=3,14

Answer 1

A área do círculo é dada por:

$\boxed{\sf Area_{circulo}~=~\pi\cdot raio^2}\\\boxed{\sf Diametro~=~2\cdot raio}$

Cálculo:

$\sf Area_{circulo}~=~\pi\cdot \left(\dfrac{Diametro}{2}\right)^2\\\\\\\sf Area_{circulo}~=~3,14\cdot \left(\dfrac{6}{2}\right)^2\\\\\\\sf Area_{circulo}~=~3,14\cdot (3)^2\\\\\\\sf Area_{circulo}~=~3,14\cdot 9\\\\\\\boxed{\sf Area_{circulo}~=~28,26~cm^2}$

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