Question

calcule a diagonal de um paralelepipedo de dimensoes 4cm,5cm e 8 cm

Answer 1

$\mathrm{a=4\ cm\ \ \|\ \ b=5\ cm\ \ \|\ \ c=8\ cm}\\\\ \mathrm{D=\sqrt{a^2+b^2+c^2}\ \to\ D=\sqrt{4^2+5^2+8^2}}\\\\ \mathrm{D=\sqrt{16+25+64}\ \to\ \boxed{\mathrm{D=\sqrt{105}\ cm}}}$