The perimeter of a rectangle is the total distance around the outside of the rectangle. Think of it like wrapping a ribbon around a present, the length of the ribbon is the perimeter of the present.

To find the perimeter of a rectangle, you need to add up the lengths of all four sides. The formula for the perimeter of a rectangle is:

Perimeter = 2 * (length + width)

Where length and width are the measurements of the sides of the rectangle.

For example, let's say you have a rectangle that is 4 units long and 3 units wide. To find the perimeter, you would use the formula:

Perimeter = 2 _ (4 + 3) = 2 _ 7 = 14 units

So, the perimeter of the rectangle is 14 units.

Calculating the perimeter of a rectangle is an important part of mathematics, and it is used in many different ways to measure and solve problems.