Question

Num Cubo de aresta de 10 cm quanto mede

A diagonal da face
A diagonal do cubo

Answer 1

a = 10 cm

A      B

C      D     face

a = 10 cm

d = AD = BC = ?

10² + 10² = d²

100 + 100 = d²

200 = d²

d = √200

d = 10√2 cm  ------ diagonal da face

diagonal do cubo

D = a√3

D = 10√3 cm      diagonal do cubo