Răspuns :
Aria=L*l
240=80*l
l=240:80
l=3
P=l+l+L+L
P=80+80+3+3
P=160+6
P=166
240=80*l
l=240:80
l=3
P=l+l+L+L
P=80+80+3+3
P=160+6
P=166
pai aria =lungime ori latime deci,240=80ori latime ,latimea =240 impartit la 80 =3.Si perimetrul =2lungime+2 latime =2ori 80+2 ori 3=166cm