The perimeter of the triangle ABC is 62 cm BC = 17 cm, AB = CA find the length of the side AB.

An isosceles triangle is a triangle in which the two sides are equal in length. Equal sides are called lateral, and not an equal side is called the base.

Given:
AB = CA;
BC = 17 cm;

AB =? cm ;
P = 62 cm.

Let’s calculate the total length of the sides AB and CA:

1) 62 – 17 = 45 (cm);

We know that they are equal, which means:

2) 45: 2 = 22.5 (cm) length AB or CA

Answer: AB = 22.5 cm.