Question

Calcule a diagonal de um paralelepípedo de dimensoes 8cm, 4cm e 2cm

Answer 1

Formula:

$d = \sqrt{a^2 + b^2 + c^2} \\ \\ \\ d = \sqrt{8^2 + 4^2 + 2^2} \\ \\ \\ d = \sqrt{64 + 16 + 4} \\ \\ \\ d = \sqrt{84} \\ \\ \\ d = \sqrt{2^2 .3 . 7 } \\ \\ \\ d = 2\sqrt{21} ~cm$