Răspunsuri

2014-05-13T15:18:35+03:00
45 mm=4.5 cm
Lungime=4.5 cm

latime=5*4.5/9
latime=2.5

P=l+l+L+L
P=2.5+2.5+4.5+4.5
P=5+9
P=14