Square with side 7 m
Show answer
28 m
Free printable worksheet
Perimeter Practice Worksheet
Twelve perimeter problems with rectangles, polygons, missing sides, and real contexts.
Elementary MathGrades 3-54 pagesAnswer key included
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What this worksheet includes
- Twelve perimeter problems with rectangles, polygons, missing sides, and real contexts.
- 4-page printable PDF with a complete answer key
- Designed for Grades 3-5 elementary math practice
- Available as an immediate free download with no email required
How to use it
Use this perimeter practice worksheet for guided practice, independent review, homework, tutoring sessions, or a quick skills check. The spacious layout is designed to leave room for students to show their work rather than guess from crowded answer choices.
After students finish, compare their reasoning with the included answer key. When an answer is incorrect, have the student locate the first step where their work changed direction before trying the problem again.
Who this practice is for
This resource is designed for grades 3-5 students working on elementary math. Teachers, tutors, homeschool families, and parents can preview the first page before deciding whether the level and spacing fit the student.
Looking for a broader sequence? Browse all Elementary Math worksheets.
Topic guide
How to approach perimeter practice
Perimeter is the total distance around a two-dimensional figure. Add every outside side length, or use a valid shortcut when opposite sides are equal.
Perimeter is measured in linear units such as centimeters or feet. Marking each side prevents interior lines or missing sides from changing the total.
Learning objectives
- Find perimeter of common polygons
- Determine missing side lengths
- Use correct linear units
Skills to review first
- Adding whole numbers and decimals
- Polygon side vocabulary
- Opposite sides of rectangles
Worked example
Follow the reasoning step by step
Find the perimeter of a rectangle 8 cm long and 5 cm wide.
- A rectangle has two sides of each length.
- Write 8 + 5 + 8 + 5.
- Add the four side lengths.
- Use centimeters, a linear unit.
Solution: 26 cm.
Try before downloading
Three sample problems
Work each problem, then open the answer to check your result.
Triangle with sides 4, 6, and 9 in
Show answer
19 in
Rectangle 12 ft by 3 ft
Show answer
30 ft
Error check
Common mistakes to watch for
- Multiplying length and width to find perimeter
- Leaving out an unlabeled but equal side
- Using square units