Răspuns :
1. 2x(l+4l)=420 l=latimea L=lungimea
10l=420
l=42
L=168
2. 2x(l+18+2l)=420
6l+36=420
6l=384
l=64
L=146
10l=420
l=42
L=168
2. 2x(l+18+2l)=420
6l+36=420
6l=384
l=64
L=146