Răspunsuri

2014-05-29T13:21:30+03:00
( L+l+h ) ^{2} = L^{2} + l^{2} + h^{2} +2Lh+2lh+2LlA_{t}=2Lh+2lh+2Ll \\ d_{paralelipiped}= \sqrt{L^{2}+l^{2}+h^{2}} \\
si finalizare: (L+l+h)la patrat=d patrat+aria totala=12*12+25=169 rezulta L+l+h=13