The perimeter of triangle ABC is 62cm. BC = 17cm AB = AC. Find the length of the side AB.

As we know from the rule, the perimeter of a triangle is equal to the sum of the lengths of its three sides.

We know that the perimeter of triangle ABC is 62 cm, side BC = 17 cm, AB = AC.

1. Let’s find the sum of the sides AB and AC, since the sum of the sides AB, AC, BC = 62 cm, and BC = 17 cm, then:

62 – 17 = 45 cm.

Received: AB + AC = 45 cm.

2. As we know from the condition of the problem, sides AB = AC, we find the length of each side, if we know the sum of the two sides – 45 cm:

45: 2 = 22.5 cm.

AB = AC = 22.5 cm.

Answer: side AB = 22.5 cm.