Perimeter Resources

The perimeter is the total distance around the outside of a two-dimensional shape. For a square, which has four equal sides, the perimeter can be calculated by adding the lengths of all sides or multiplying one side by four (P = 4 × s). Understanding perimeter helps students visualize the boundary of a shape and connects directly to skills in addition, multiplication, and measurement.

Education.com provides worksheets and activities for students to practice calculating the perimeter of various shapes, including squares, rectangles, triangles, circles (circumference), and other polygons. Each resource offers step-by-step guidance, examples, and exercises to reinforce the formulas for different shapes. Students can build confidence in their math skills while learning to measure and calculate perimeters accurately.

Teachers, parents, and homeschoolers can use these materials to support classroom instruction or independent practice. The resources also link to related geometry concepts such as area, angles, and shape properties, helping students develop a comprehensive understanding of two-dimensional shapes and their measurements. With interactive and printable options, learners can explore perimeter in a hands-on, engaging way.

Perimeter is the total length around a shape, and for different shapes, there are different ways to calculate it.

• Square: perimeter = 4 × s, where s is the length of a side
• Rectangle: perimeter = 2 × (w + h), where w is width and h is height
• Triangle: perimeter = a + b + c, where a, b, and c are the lengths of three different sides
• Circle: the perimeter for a circle is actually called the circumference. Circumference = 2 × π × r, where r is the radius.
• Quadrilateral: perimeter = a + b + c + d, where a, b, c, and d are lengths of different sides

If you want to learn more about the different shapes, you can check out our geometry page to get a better idea of what circles are and the different polygons you can calculate the perimeter of.

After you practice your perimeter skills with the resources on this page, you can then move over to our area resources to learn how to calculate the amount of space inside a shape.