Find the perimeter of a square if the length of one side is given. Are the perimeter of the square and the length of its side directly proportional quantities? Explain.

2 in

All the sides of a square are equal.

Perimeter of a square = 4 (measure of 1 side)

Therefore if a square contains 4 sides, and the measure of one side is 2 inches, the perimeter is 8 inches. (2x4)

The definition of directly proportional is when one substance increases at the same rate of another substance. When a number is plugged into our formula, the perimeter increases.