Question

va rog e urgent, am nevoie într-o ora​

Answer 1

 

In imagine nu se vede una din cele 3 dimensiuni.
Consider ca dimensiunile sunt:

.

$\displaystyle\bf\\L = 18~cm\\l = 4~cm\\h = 12~cm\\Se~cere:\\Volumul~(V)=?\\Aria~totala~(At) = ?\\Diagonsla~(D) = ?\\\\Rezolvare:\\V=L\times l\times h\\\\V=18\times 4\times 12\\\\\boxed{\bf V=864~cm^3}\\\\At=2(L\times h+l\times h+L\times l)\\\\At=2(18\times 12+4\times 12+18\times 4)\\\\At=2(216+48+72)\\\\At=2\times 336\\\\\boxed{\bf At=672~cm^2}\\\\D=\sqrt{L^2+l^2+h^2}\\\\D=\sqrt{18^2+4^2+12^2}\\\\D=\sqrt{324+16+144}\\\\D=\sqrt{324+16+144}\\\\D=\sqrt{484}\\\\\boxed{\bf D=22~cm}$