Question

porrrrrr favorrrrrrr ​

Answer 1

$\large\boxed{\begin{array}{l} \sf A=\pi\cdot\bigg(\dfrac{20}{2}\bigg)^2\\\sf A=3,14\cdot10^2\\\sf A=3,14\cdot100\\\sf A=314\,cm^2\\\huge\boxed{ \boxed{ \boxed{ \boxed{ \sf \dagger \red{ \maltese}~ \blue{alternativa~A}}}}}\end{array}}$