The perimeter $P$ of a square can be calculated using the length of one side $l$. Since a square has four equal sides, the formula for the perimeter is:

$P = 4l$

Here, $P$ is the perimeter of the square, and $l$ is the length of one side.

Explanation:

• A square has four sides of equal length.
• The perimeter is the total length around the square.
• Therefore, if each side is of length $l$, the perimeter is simply four times $l$.

Would you like more details or have any questions? Here are some related questions that might interest you:

1. How do you find the area of a square?
2. What is the relationship between the area and the perimeter of a square?
3. How does the formula for the perimeter change if the shape is a rectangle instead of a square?
4. Can you provide an example of calculating the perimeter of a square with a given side length?
5. How does changing the side length of a square affect its perimeter?
6. What is the difference between perimeter and area?
7. How do you find the length of a side if the perimeter of the square is known?
8. What are some real-life applications of calculating the perimeter of a square?

Tip: Remember that the perimeter is a measure of the distance around a shape, while the area measures the space within the shape.