What is the perimeter of the triangle ABC if AB = 2 cm BC = a cm, AC = 14 cm Find the value of the perimeter at a = 18 cm.

To solve this problem, you need to know some geometric formulas.
Let’s make a short condition:
AB – 2 centimeters;
BC – and centimeters;
AC – 14 centimeters;
Perimeter of triangle ABC -? centimeters;
Let’s solve the problem provided that a = 18 centimeters.
First, it is necessary to recall the definition of the concept, from which its formula follows:
Perimeter is the sum of the lengths of all sides.
The perimeter of the triangle ABC is:
P = AB + BC + AC;
Let’s substitute all numeric data into the formula:
P = 2 + 18 + 14 = 34 centimeters;
Answer: 34 centimeters.