Răspunsuri

2014-05-04T14:22:59+03:00
Perimetru= 22,5 cm
L + l = 22,5 cm:2= 11,25 cm
L= 3,9 + l
l+3,9cm+ l = 11,25 cm
2l= 11,25 cm- 3,9 cm
2l= 7,35
l= 7,35 :2
l= 3,635 cm

L= 3,635+3,9=7,575 cm