Răspuns :
perimetrul=4l
4l=l+2.25
4l-l=2.25
3l=2.25
l=2.25:3
l=0.75
Aria=lxl
Aria=0.75*0.75
Aria=0.5625 m patrati
4l=l+2.25
4l-l=2.25
3l=2.25
l=2.25:3
l=0.75
Aria=lxl
Aria=0.75*0.75
Aria=0.5625 m patrati
Perimetrul patratului = 4l = l+2.25
l+2.25=4l ⇒ 2.25=4l-l ⇒ 3l=2.25
l=2.25 ÷ 3
l=0.75
Aria patratului = l² ⇒ A = (0.75)² = 0.5625
l+2.25=4l ⇒ 2.25=4l-l ⇒ 3l=2.25
l=2.25 ÷ 3
l=0.75
Aria patratului = l² ⇒ A = (0.75)² = 0.5625