Question

perimetrul unui triunghi este 90 cm.afla latura,stiind caacesta sunt exprimate prin numere consecutive

Answer 1

l₁+l₂+l₃=90
l₁+l₁+1+l₁+2=90
3l₁+3=90
3l₁=90-3=87
l₁=87:3
l₁=29
l₂=29+1=30
l₃=29+2=31 sau l₃=30+1=31
proba 29+30+31=90
metoda grafica:
l₁ /............./
l₂ /............./..+1../
l₃ /............./..+1../...+1../      ⇔ 90
3 parti+1+1+1=90
3 parti+3=90
3 parti=90-3=87
1 parte=87:3=29
1 parte=l₁=29
l₂=29+1=30
l₃=30+1=31