If the perimeter of a square is 16, what is the length of one side?

To determine the length of one side of a square when the perimeter is known, it's essential to understand the properties of a square. A square has four equal sides. The formula to calculate the perimeter (P) of a square is given by:

[ P = 4 \times \text{side length} ]

In this problem, the perimeter is specified as 16. We can set up the equation based on the perimeter formula:

[ 16 = 4 \times \text{side length} ]

To find the side length, we can divide both sides of the equation by 4:

[ \text{side length} = \frac{16}{4} = 4 ]

Thus, the length of one side of the square is 4. This confirms that the answer is correct, as it aligns with the direct application of the perimeter formula for a square.