The perimeter is the total distance around the outside of a shape. 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 shape, you need to add up the lengths of all sides. The formula for the perimeter depends on the shape you are working with.

For example, if you have a square, the formula for the perimeter is:

Perimeter = 4 * side

Where side is the length of one side of the square.

For a rectangle, the formula is:

Perimeter = 2 * (length + width)

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

For a circle, the formula is:

Perimeter = 2 _ π _ radius

Where π (pi) is a mathematical constant and radius is the distance from the center of the circle to the edge.

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