Question

Sa se calculeze aria totala si lungimea diagonalelor unui paralelipiped dreptunghic cu dimensiunile de 6cm,7cm si 8cm

Answer 1

Salut,

L=7cm

l=6cm

h=8cm

At=Al+2*Ab;

Al=Pb*h;

Pb=2(l+L);

Pb=2(6+7)=2*13=26(cm);

Al=26*8=208(cm²);

Ab=l*L;

Ab=6*7=42(cm²);

At=208+2*42=208+84=292(cm²);

d²=l²+L²+h²;

d=√(l²+L²+h²);

d=√(6²+7²+8²)

d=√(36+49+64)

d=√149(cm).

Bafta!