Question

calcule a area do circulo que tem diametro igual a 20 cm. use π=3,14

Answer 1

se d=20cm r=10cm
então
Area=πr²
A= 3,14.10²
A= 3,14.100
A= 314 cm²

Answer 2

Resposta:

$\textsf{Leia abaixo}$

Explicação passo-a-passo:

$\mathsf{ A=\pi\cdot\left(\dfrac{d}{2}\right)^2}$

$\mathsf{A=3{,}14\cdot\left(\dfrac{20}{2}\right)^2 }$

$\mathsf{ A=3{,}14\cdot(10)^2}$

$\mathsf{A=3{,}14\cdot100 }$

$\boxed{\boxed{\mathsf{ A= 314\,cm^2}}}$