Aflati lungimile laturilor ∆ABC stiind ca AB + AC = 17 cm , AC + BC = 19 cm si AB + BC = 18 cm

Răspuns :

AB+AC++AC+BC+AB+BC =17+19+18

2AB+2AC+2BC =54

2(AB+AC+BC) =54

AB+AC+BC =54:2=27

17+BC =27

BC=27-17=10

AC+10=19

AC=19-10=9

AB+10=18

AB=18-10=8