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

We need to determine the length of the side of the triangle AB.
From the problem statement, we know that the perimeter of this triangle is 62 cm. We know that the perimeter of a figure is calculated as the sum of the lengths of all its sides. That is, in our case:
P = AB + BC + AC
But from the problem statement we know the following:
P = 62 cm;
BC = 17 cm
AB = AC
Based on this, our expression will take the following form:
62 = 17 + AB + AB;
AB * (1 + 1) + 17 = 62;
2 * AB = 62 – 17;
2 * AB = 45;
AB = 45/2
Thus, the length of the desired side:
AB = 22.5cm