The perimeter of a triangle is 51 cm. The length of its sides are x cm, x + 2 and x + 4 can. What is the length, in cm, of the longest side of the triangle?

Answer 1

19 cm for the longest side

x + x+ 2 + x+ 4 = 51

3x = 51 -6 = 45

x = 45/3 = 15

longest side is x+4 = 15+4 = 19 cm