Răspuns :
P=2*l+2*L=104cm
l=4/9*L=4L/9
2L+2*4L/9=104
2L+8L/9=104
18L+8L=104*9
26L=936
L=936/26
L=36cm
l= 4*36/ 9=16cm
L*l=36*16=576 cm²
l=4/9*L=4L/9
2L+2*4L/9=104
2L+8L/9=104
18L+8L=104*9
26L=936
L=936/26
L=36cm
l= 4*36/ 9=16cm
L*l=36*16=576 cm²