[tex]\begin{description}\large{Salut!}\\\end{description}[/tex]
[tex]\begin{description}\\Lungimea unui cerc este egala cu $2\pi r$.\\Din moment ce stim lungimea cercului de $20\sqrt2\pi$ putem sa o egalam cu formula pentru a extrage lungimea razei:\end{description}[/tex]
[tex]\begin{center}\begin{aligned}\\2\pi r & = 20\sqrt2\pi\\2\pi r \div (2\pi) & = 20\sqrt2\pi \div (2\pi)\\r & = 20\sqrt2 \div (2\pi)\\r & = 10\sqrt2\end{aligned}\\\end{center}[/tex]
[tex]\begin{description}\\\emph{-Luke48}\\\end{description}[/tex]
