AJUTOR URGENT DAU COROANA!!

P= 2L+2 l
l= L/3
96= 2L+ 2L/3
96=8L/3
288= 8L
L=36
l= 36/3
l=12
A=L×l= 36×12= 432 cm²
l=L/3=> L=3l
P=2(L+l)=96 cm
L+l=48 cm
3l+l=48 cm
4l=48 cm
l=12 cm
L=3l=3•12=36 (cm)
A=L•l=36•12=432 (cm²)