Răspuns :
4L = 7l
4*35 cm = 7l
7l = 140 cm
l = 20 cm (latimea)
P = 2l + 2L = 40 + 70 = 110 cm
Latimea = 35 :7 x 4=
=> 5 x4= 20 Cm
Perimetrul = (35+20) x2=
=> 55 x 2 = 110 Cm
=> 5 x4= 20 Cm
Perimetrul = (35+20) x2=
=> 55 x 2 = 110 Cm