Un dreptunghi are P=8,24 cm.
L=3×l
L=?
l=?


Răspuns :

P=2(L+l)=8,24
L+l=8,24:2
3l+l=4,12
4l=4,12
l=4,12:4=1,03
L=1,03×3=3,09
P=8,24 cm
L+l=8,24:2=4,12
3L+l=4l=4,12
l=4,12:4=1,03
L=1,03x3=3,09