These worksheets help students practice finding the perimeter of shapes by adding the lengths of all the sides. Below you’ll find a quick explanation, formulas, examples, and free printable perimeter practice pages.
What Is Perimeter?
Perimeter is the total distance around the outside of a shape. To find the perimeter, you add the lengths of all the sides together.
Perimeter is measured in units such as inches, centimeters, feet, or meters.
Perimeter Formulas
Here are the most common perimeter formulas students use:
- Square: (Add all four equal sides.)
- Rectangle: (Add the length twice and the width twice.)
- Triangle: (Add all three sides.)
- Any polygon: Add the length of every side.
How to Find the Perimeter
- Identify all the side lengths of the shape.
- Add the lengths together.
- Include the correct unit in your answer.
- If a side is missing, use the shape’s properties to figure it out (for example, opposite sides of a rectangle are equal).
Free Printable Perimeter Worksheets
Worksheet 1 Worksheet 2More Geometry Worksheets
For additional practice with basic geometry skills, you can also use this worksheet on finding missing angles in triangles:
Find the Missing Angle in the Triangles
For more practice or help with other pre-algebra topics, try our workbooks.
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