Răspuns :
X=lățimea
3x=lungimea
3x+x×2=36
4x=18
x=4,5
3x=13,5
Lungimea=13.5
Lățimea=4.5
3x=lungimea
3x+x×2=36
4x=18
x=4,5
3x=13,5
Lungimea=13.5
Lățimea=4.5
L*2+l*2=36cm
L=3l
3l*2+l*2=36cm
6l+2l=36cm
8l=36cm
l=36cm:8
l=4,5cm
L=4,5cm*3
L=13,5cm
proba: 13,5cm*2+4,5cm*2=27cm+9cm=36cm
L=3l
3l*2+l*2=36cm
6l+2l=36cm
8l=36cm
l=36cm:8
l=4,5cm
L=4,5cm*3
L=13,5cm
proba: 13,5cm*2+4,5cm*2=27cm+9cm=36cm