Răspuns :
P dreptunghi=2(L+l) =252 => L+l=126
Inlocuiesti L=28+l => 28+l+l=126 => 2l=98 => l=49cm si L=28+49=77
Inlocuiesti L=28+l => 28+l+l=126 => 2l=98 => l=49cm si L=28+49=77
258+28=280 apoi 280+280=560 , 252 +252=504 si560+504=1064