Question

qual o comprimento da circunferência cujo raio mede 40 cm?

Answer 1

$Ola' \\ \\ \boxed{C=2\pi r} ~~--\ \textgreater \ onde: \begin{cases}r=40cm \\ \pi=3,14~--\ \textgreater \ aproximado\end{cases} \\ \\ C=\underbrace{2(3,14).(40cm)}_{251,2cm} \\ \\ \boxed{\boxed{C=251,2cm}}\\ \\ \\ \\ \mathbb{iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii}\\~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Espero~ter~ajudado!!$

Answer 2

C = 2. pi . r
C = 2 . 3,14 . 40
C = 252,2