Răspuns :
P=170 m
2*L+2*l=170
L=l+15
2*(l+15)+2*l=170
2l+30+2l=170
4l=170-30
4l=140
l=35m
L=35+15=50m
2*L+2*l=170
L=l+15
2*(l+15)+2*l=170
2l+30+2l=170
4l=170-30
4l=140
l=35m
L=35+15=50m
170-30(aici am adunat 15 +15)=140
140/4=35(latimea)
35+15=50(lungimea)
140/4=35(latimea)
35+15=50(lungimea)