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

The perimeter of any geometric figure is the sum of the lengths of all its sides. That is, the perimeter of the triangle is expressed by the formula: P = a + b + c.

The perimeter of the triangle given in the problem statement is: P = AB + BC + AC. We know two values in this formula: the perimeter itself and the length of the side BC.

62cm = 17cm + AB = AC; (now we will transfer all known parts to the left side, and unknown ones to the right)

62 – 17 = AB + AC

45 = AB + AC (since these sides are equal, 45 must be divided by 2)

AB = AC = 22.5 cm.

Answer: 22.5 cm.