Răspunsuri

2014-05-08T18:23:09+03:00
Perimetrul = 4×l = l+l+l+l
l+180=Perimetru
l+180=4×l
180=3×l
l=60 cm
Perimetrul=60×4=240
3 4 3
2014-05-08T19:16:43+03:00
L=Pb-180
l=4l-180 |+180
l+180=4l |-l
180=3l | :3
60=l
Pb=4l=4*60=240
2 3 2