Perimeter is the distance around a two-dimensional shape. 3 + 3 + 3 + 3 + 3 = 5×3 = 15. The perimeter of a circle is called the circumference:

Perimeter formulas are used to find the distance around the 2-d shape by adding its side lengths. Perimeter is considered as the total length of the sides of different shapes.

The perimeter of a shape is determined by adding the length of all the sides and edges enclosing the shape. It is measured in linear units of measurement like centimeters, meters, inches, or feet.

Circle: To measure the distance around a circle, or its perimeter, you use the perimeter formula two times pi times the radius (P = 2πr). Remember, the radius is the straight line from the …

The perimeter of any polygon is the sum of the lengths of all the sides. Note: "ab" means "a" multiplied by "b". "a 2 " means "a squared", which is the same as "a" times "a".

Learn the formula for perimeter and how it is used in maths. Have a look at perimeter formulas by shape and use our practice problems to apply it.

Jul 23, 2025 · The perimeter is the total boundary length of a closed figure, calculated by adding the lengths of its sides (e.g., triangle, rectangle, square, circle, etc.). Formula for Perimeter of …

A simple way to remember perimeter: “ Add all the outer sides together.” For polygons, walk along each edge and add up; for circles, just remember “circumference”.

The perimeter is the total length or distance around a two dimensional shape. In the figure below, the perimeter of each shape is the sum of the lengths of each side, shown in red.

Aug 18, 2025 · Squares and rectangles are the easiest shapes to find the perimeter for. Just add up all four sides! For squares, where all sides are equal, multiply one side by 4. For …