Răspuns :
L-lungime
l-latime
l/L =4/5
l/20 =4/5 rezulta l=16cm
P= 2l+2L = 32 + 40 = 72cm
l-latime
l/L =4/5
l/20 =4/5 rezulta l=16cm
P= 2l+2L = 32 + 40 = 72cm
l/L = 4/5
l/20 = 4/5
5l = 80
l = 80: 5 = 16
P = ( 20 + 16) x 2 = 36 x 2 = 72
l/20 = 4/5
5l = 80
l = 80: 5 = 16
P = ( 20 + 16) x 2 = 36 x 2 = 72