The side of the rectangle is 13 and the perimeter is 38. Find the other side of the rectangle.

Before solving this problem, it is useful to remember the formula for finding the perimeter: P = 2 * (a + b);

Where:

P is the perimeter itself;

a is the length of one side;

b is the length of the second side;

We know the length of one side and the perimeter. Then finding the length of the other side is not a problem:

38 = 2 * (13 + b);

19 = 13 + b;

b = 6;