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Perimeter - Worksheet 8 - 3rd Grade

Hard

Use labeled dimensions to calculate perimeter and explain the units.

hard: Solve for a missing measure or explain a relationship.

23 problems · 15-20 minutes · Skills: measurement, addition

About This Worksheet

This hard-level worksheet contains 23 problems designed for 3rd Grade students practicing perimeter. Hard worksheets feature challenging problems including multi-step questions, missing values, and real-world applications to push students further.

Read labeled dimensions and coordinates. Recall multiplication facts and length units.

  • Use labeled dimensions to calculate perimeter and explain the units.
  • Check your result using the method in the example before moving to the next question.

How to Solve: Worked Example

Example Problem: A rectangle has length 5 cm and width 7 cm. Find its perimeter.
Solution Steps:
  1. Add all four side lengths, or double length plus width.
Answer: 24 cm
Tip: Check your result using the method in the example before moving to the next question.
1
A rectangle has length 5 cm and width 2 cm. Find its perimeter.
2
A rectangle has length 15 cm and width 7 cm. Find its perimeter.
3
A rectangle has length 13 cm and width 9 cm. Find its perimeter.
4
A rectangle has length 2 cm and width 5 cm. Find its perimeter.
5
A rectangle has length 8 cm and width 5 cm. Find its perimeter.
6
A rectangle has length 5 cm and width 9 cm. Find its perimeter.
7
A rectangle has length 12 cm and width 7 cm. Find its perimeter.
8
A rectangle has length 2 cm and width 8 cm. Find its perimeter.
9
A rectangle has length 15 cm and width 8 cm. Find its perimeter.
10
A rectangle has length 12 cm and width 9 cm. Find its perimeter.
11
A rectangle has length 2 cm and width 4 cm. Find its perimeter.
12
A rectangle has length 5 cm and width 3 cm. Find its perimeter.
13
A rectangle has length 8 cm and width 7 cm. Find its perimeter.
14
A rectangle has length 12 cm and width 2 cm. Find its perimeter.
15
A rectangle has length 3 cm and width 4 cm. Find its perimeter.
16
A rectangle has length 4 cm and width 4 cm. Find its perimeter.
17
A rectangle has length 11 cm and width 4 cm. Find its perimeter.
18
A rectangle has length 7 cm and width 9 cm. Find its perimeter.
19
A rectangle has length 15 cm and width 5 cm. Find its perimeter.
20
A rectangle has length 6 cm and width 4 cm. Find its perimeter.
21
A rectangle has length 11 cm and width 2 cm. Find its perimeter.
22
A rectangle has length 3 cm and width 7 cm. Find its perimeter.
23
A rectangle has length 8 cm and width 3 cm. Find its perimeter.

Answer Key

1. 14 cm2. 44 cm3. 44 cm4. 14 cm5. 26 cm6. 28 cm7. 38 cm8. 20 cm9. 46 cm10. 42 cm11. 12 cm12. 16 cm13. 30 cm14. 28 cm15. 14 cm16. 16 cm17. 30 cm18. 32 cm19. 40 cm20. 20 cm21. 26 cm22. 20 cm23. 22 cm

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Frequently Asked Questions

How do I download this perimeter - worksheet 8 worksheet?

Click "Download PDF" for a file, or "Print" to use your browser. You can save it as a PDF or print it directly. The answer key will be on a separate page.

How do I find worksheets at different difficulty levels?

Each subtopic has 10 worksheets: Worksheets 1-3 are Easy, 4-7 are Medium, and 8-10 are Hard. Start with Easy worksheets to build confidence, then progress to harder ones.

What skills does this measurement worksheet cover?

This worksheet focuses on measurement, addition. It is designed for 3rd Grade students and provides structured practice through varied problem types with a worked example to guide students before they begin.

Can I use this worksheet in my classroom?

Yes. All worksheets on K12Worksheets are free for classroom use. You can print copies for your entire class. With 10 worksheets per subtopic at three difficulty levels, you have plenty of options for differentiated instruction and individualized practice.

How many problems are on this worksheet?

This worksheet contains 23 problems. It typically takes 15-20 minutes to complete. An answer key with all solutions is included so parents and teachers can check work quickly.