Răspuns :
[tex]L=45 \ m \\ l=35 \ m \\ \Rightarrow \ A_{dr}=L\cdot l=45 \ m \cdot 35 \ m=1 \ 575 \ m^2; \\ P_p=P_{dr}=2(L+l)=2 (45 \ m+35 \ m)=2 \cdot 80m=160 \ m \\ P_p=4l_p \ \Rightarrow \ l_4=\frac{160 \ m}{4}=40 \ m \\ A_p=l_p^2=(40 \ m)^2=1 \ 600 \ m^2 \\ \Rightarrow \boxed{A_{dr} < A_p}[/tex]
Răspuns:
Pdreptunghi=2(L+l)
Ppatrat=4L
P=2(45+35)=>Pdrept.=160m
160=4L=>L=160:4=>L=40 m latura dreptunghiului
Adrept.=L·l
Adrept.=45·35=>A=1575m²
Apatrat=L²=L·L
Apatrat=40·40=>Apatrat=1600 m²
Apatrat > Adrept.