Răspuns :
P dreptunghi = P patrat
P dreptunghi = 2(8+4)
P dreptunghi = 2 · 12
P dreptunghi = 24 cm
P patrat = 24
P patrat = 4l
4l = 24
l = 24 : 4
l = 6 cm
Sper ca te-am ajutat !
P dreptunghi = 2(8+4)
P dreptunghi = 2 · 12
P dreptunghi = 24 cm
P patrat = 24
P patrat = 4l
4l = 24
l = 24 : 4
l = 6 cm
Sper ca te-am ajutat !
[tex]P_{p}=P_{d}[/tex]
[tex]P_{p}=4l[/tex]
[tex]P_{d} = 2(L+l)[/tex]
[tex]4l_{p}=2(L+l_{d})\:|:2[/tex]
[tex]2l_{p}=L+l_{d}[/tex]
[tex]2l_{p}=8+4[/tex]
[tex]2l_{p}=12[/tex]
[tex]l_{p}=12\:\div\:2[/tex]
[tex]l_{p}=6\:cm[/tex]
[tex]P_{p}=4l[/tex]
[tex]P_{d} = 2(L+l)[/tex]
[tex]4l_{p}=2(L+l_{d})\:|:2[/tex]
[tex]2l_{p}=L+l_{d}[/tex]
[tex]2l_{p}=8+4[/tex]
[tex]2l_{p}=12[/tex]
[tex]l_{p}=12\:\div\:2[/tex]
[tex]l_{p}=6\:cm[/tex]