Răspuns :
P = 2*(L+l)
daca P=20 m si l = L - 2 atunci ,
2*(L + L-2) = 20 | :2
2*L - 2= 10
2*L = 12
L = 12/2 = 6 m
daca P=20 m si l = L - 2 atunci ,
2*(L + L-2) = 20 | :2
2*L - 2= 10
2*L = 12
L = 12/2 = 6 m
P=20
l=L-2
P=2L+2l
20=2L+2(L-2)
20=2L+2L-4
4L=20+4
L=24:4=6 LUNGIMEA
l=6-2=4 LATIMEA
l=L-2
P=2L+2l
20=2L+2(L-2)
20=2L+2L-4
4L=20+4
L=24:4=6 LUNGIMEA
l=6-2=4 LATIMEA