[tex] P_{patrat}=P_{dreptunghi}\\
L=10\cdot{l}\;\;(L-lungimea dreptunghiului si l-latimea dreptunghiului);\\
\downarrow\\
4\cdot{l_{patrat}}=2\cdot(\underbrace{10l_{dreptunghi}+l_{dreptungi}}_{=M_2})\\
4\cdot{l_p}\;=2\cdot11\cdot{l_d}\rightarrow\\
pt.\;\;l_d=2\;\;obtinem\;\\
P_d=44\Rightarrow\;4\cdot{l_p}=44\;;\;l_p=11\\
pt.\;\;l_d=4\;\;obtinem\;\;\\
P_{d}=4*l_p=2*(10*4+4)=88\;;\;4*l_p=88\rightarrow\;l_p=22 \\
etc.[/tex]
