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Grade 3 Area & perimeter — Stretch your thinking

Area measures a surface; perimeter measures a distance around it. Try the more demanding numbers. Estimate first, then explain your method and verify.

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Grade 3 Area & perimeter — Stretch your thinking

Name: ________________________   Date: ______________

20 questions

Directions: Label length and width clearly. Write your answer for each problem.

  1. Rectangle: 13 by 4 units. Find PERIMETER.
  2. Rectangle: 18 by 23 units. Find PERIMETER.
  3. Rectangle: 18 by 3 units. Find PERIMETER.
  4. Rectangle: 19 by 7 units. Find PERIMETER.
  5. Rectangle: 2 by 4 units. Find AREA.
  6. Rectangle: 23 by 28 units. Find AREA.
  7. Rectangle: 15 by 23 units. Find PERIMETER.
  8. Rectangle: 21 by 21 units. Find PERIMETER.
  9. Rectangle: 17 by 12 units. Find AREA.
  10. Rectangle: 7 by 12 units. Find AREA.
  11. Rectangle: 23 by 11 units. Find AREA.
  12. Rectangle: 2 by 8 units. Find PERIMETER.
  13. Rectangle: 25 by 27 units. Find AREA.
  14. Rectangle: 15 by 12 units. Find AREA.
  15. Rectangle: 17 by 19 units. Find AREA.
  16. Rectangle: 15 by 13 units. Find PERIMETER.
  17. Rectangle: 7 by 3 units. Find AREA.
  18. Rectangle: 20 by 8 units. Find AREA.
  19. Rectangle: 21 by 27 units. Find PERIMETER.
  20. Rectangle: 13 by 10 units. Find PERIMETER.

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Show answer key (for parents and teachers)
  1. 1. 34 units
  2. 2. 82 units
  3. 3. 42 units
  4. 4. 52 units
  5. 5. 8 square units
  6. 6. 644 square units
  7. 7. 76 units
  8. 8. 84 units
  9. 9. 204 square units
  10. 10. 84 square units
  11. 11. 253 square units
  12. 12. 20 units
  13. 13. 675 square units
  14. 14. 180 square units
  15. 15. 323 square units
  16. 16. 56 units
  17. 17. 21 square units
  18. 18. 160 square units
  19. 19. 96 units
  20. 20. 46 units

How to help with this skill

Third graders begin to use multiplication, division, fractions and measurement regularly. Discuss which operation fits the question.

  • Label length and width clearly.
  • Multiply length by width for a rectangle’s area.
  • Add all four sides, or calculate 2 × (length + width), for perimeter.

Try this: Trace the edge of a book for perimeter and cover its surface with squares for area.

Choose a different level

Gentle practiceEveryday practiceStretch your thinking

More Grade 3 practice

AdditionSubtractionMultiplicationDivisionMixed operations

Supplementary math practice, not a full curriculum. Review answers with your learner.