Perimeter of a triangle

Perimeter P = a + b + c

AB = a
BC = b
CA = c

Example

ABC is a triangle with a = 4 cm, b = 3 cm et c = 2 cm
Perimeter P of a triangle ABC = a + b + c = 4 + 3 + 2 = 9 cm

Calculate the perimeter of a triangle

Side a = AB
Side b = BC
Side c = CA
Perimeter of the triangle