Questão 2507448

. \(\frac{\left(R\ +\ r\right)}{2}\) + 2 . \(\sqrt{c^2\ +\ \left(R\ -\ r\right)^2}\)

. (R + r) + 2 . \(\sqrt{c^2\ +\ R^2\ -\ r^2}\)

. (R + r) + 2 . \(\sqrt{c^2\ +\ \left(R\ -\ r\right)^2}\)

. \(\frac{\left(R\ +\ r\right)}{2}\) + 2 . \(\sqrt{c^2+\left(R+r\right)^2}\) \(\sqrt{c^2\ +\ R^2\ +\ r^2}\)

. (R + r) + 2 . \(\sqrt{c^2\ +\ R^2\ +\ r^2}\)