Răspuns :
a= latimea
a+1=lungimea
P= 2(a+a+1)=26
2a+1=13
2a=12
a=12:2=> a=6cm latimea
a+1 = 6+1 =7 cm lungimea
a+1=lungimea
P= 2(a+a+1)=26
2a+1=13
2a=12
a=12:2=> a=6cm latimea
a+1 = 6+1 =7 cm lungimea