Răspunsuri

2014-05-09T13:07:45+03:00
P = 2l + 2L

P = 46 cm  si  L = 15 cm

46 = 2l + 2*15
46 = 2l + 30  ⇒  2l = 46 - 30  ⇒  2l = 16  ⇒  l = 16 / 2  ⇒  l = 8 cm
2014-05-09T13:11:03+03:00
P=2(L+l)
46=2(15+l) |:2
23=15+l |-15
l=8