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Perimeter worksheet generator

Practice adding up side lengths. Choose simple rectangles, mixed polygons, or missing-side problems where students work backwards from a known perimeter.

At a glance

The perimeter worksheet generator makes a fresh printable practice sheet in seconds. Perimeter of rectangles, squares, triangles and irregular polygons. Every time you change a setting, the page rebuilds instantly, so you can print a different sheet for every group or lesson. It is designed for clean printing on US Letter or A4 paper with half-inch margins.

Using the perimeter worksheet generator

The perimeter worksheet generator builds a fresh sheet every time you load the page, so no two classes ever get the same problems.

Choose the problem type — Mixed shapes, Rectangles and squares and Find the missing side — then set the difficulty, how many problems you want and how many columns they sit in. The preview updates as you change each setting, so the page you see is exactly the page that prints.

An answer key prints behind the worksheet whenever you want one, and paper size can be set to US Letter or A4. Margins are fixed at half an inch so the sheet prints cleanly on any home or school printer.

Teaching with perimeter worksheets

Perimeter of rectangles, squares, triangles and irregular polygons. Because the problems regenerate, the same perimeter worksheet generator covers a warm-up on Monday, a homework sheet on Wednesday and a quick check on Friday without any of them repeating.

Teachers usually print a short version — eight to twelve problems — for a starter activity, and a fuller page for independent practice or a substitute lesson. Parents often print two copies of the same settings, work one alongside the child, then hand over the second.

Helping students who get stuck

Units are easy to lose here — square units for area, plain units for length — so make labelling part of the answer.

If a student is getting most of the page wrong, drop the difficulty a level and print again rather than working through the harder sheet — confidence recovers faster than accuracy does.

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Created by Tim van de Vall

B.S. in Computational Media, Georgia Institute of Technology. Each perimeter worksheet generator is designed for clean printing on US Letter and A4 paper.

Updated 2026-08-14About the authorEditorial policy

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Perimeter worksheet generator FAQ

What is the fastest way to teach perimeter?
Have students trace the outside of the shape with a finger while adding each side out loud. Once that is automatic, introduce the rectangle shortcut P = 2(l + w).
How do I print or save these worksheets as a PDF?
Click Print worksheet and choose your printer, or pick “Save as PDF” as the destination to keep a digital copy. The answer key prints on its own page.
Can I get a fresh set of problems?
Yes. Click New problems for a brand new randomly generated worksheet, as many times as you like.
Is this worksheet generator free?
Yes. Every generator on the site is free to use, with no account, no watermark and unlimited printing for classroom or home use.