Răspuns:
semiperimetrul=L+l=2172m
L=3xl
2172-172=2000
3l+l=2000
4l=2000
l=2000:4=500
L=172+(500x3)
L=1672m
gardul
L=1672m+200cm=1672,200m
l=500m+200cm=500,200m
1672,200x2+500,200x2=3344,400+1000,400=4344,800m
stalpi
4344,800m:2=2172stalpi
Explicație pas cu pas: