In triangle ABC the lengths of the sides are AB = 7, BC = 2, AC = 6.

To find the perimeter of a given triangle ABC.

If the problem statement says that the sides of this triangle are equal: AB = 7, BC = 2,

AC = 6.

And the perimeter of a triangle is the sum of the lengths of all its sides, which means:

perimeter = AB + BC + AC.

Let’s substitute our given numbers instead of letters and calculate the perimeter of our triangle.

7 + 2 + 6 = 15.

1) 7 + 2 = 9;

2) 9 + 6 = 15.

Answer: The perimeter of triangle ABC is 15.