Răspunsuri

2014-05-02T10:29:27+03:00
2014-05-02T10:40:37+03:00
l = latimea
L = lungimea
Perimetrul=42 si l=7
Perimetrul = L+L+l+l
42=2L+14
2L=42-142L=28⇒L=14