FreeMath
Grade 6medium

Circumference of Circles Practice

Practice finding the circumference of circles. Use C = 2πr when given radius, or C = πd when given diameter. Using π ≈ 3.14 for calculations.

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All 20 Practice Problems

Every question in this set. Solve them on paper, or use the interactive tool above for instant feedback and hints.

  1. 1.Circle: radius 3. Circumference = ? (use π = 3.14)
  2. 2.Circle: diameter 10. Circumference = ?
  3. 3.Circle: radius 5. Circumference = ?
  4. 4.Circle: diameter 14. Circumference = ?
  5. 5.Circle: radius 7. Circumference = ?
  6. 6.Circle: diameter 20. Circumference = ?
  7. 7.Circle: radius 2. Circumference = ?
  8. 8.Circle: diameter 8. Circumference = ?
  9. 9.Circle: radius 10. Circumference = ?
  10. 10.Circle: diameter 6. Circumference = ?
  11. 11.Circle: radius 4. Circumference = ?
  12. 12.Circle: diameter 12. Circumference = ?
  13. 13.Circle: radius 6. Circumference = ?
  14. 14.Circle: diameter 16. Circumference = ?
  15. 15.Circle: radius 8. Circumference = ?
  16. 16.Circle: diameter 22. Circumference = ?
  17. 17.Circle: radius 9. Circumference = ?
  18. 18.Circle: diameter 18. Circumference = ?
  19. 19.Circle: radius 15. Circumference = ?
  20. 20.Circle: diameter 30. Circumference = ?
Show answer key
  1. 1.Circle: radius 3. Circumference = ? (use π = 3.14) Answer: 18.84
  2. 2.Circle: diameter 10. Circumference = ? Answer: 31.4
  3. 3.Circle: radius 5. Circumference = ? Answer: 31.4
  4. 4.Circle: diameter 14. Circumference = ? Answer: 43.96
  5. 5.Circle: radius 7. Circumference = ? Answer: 43.96
  6. 6.Circle: diameter 20. Circumference = ? Answer: 62.8
  7. 7.Circle: radius 2. Circumference = ? Answer: 12.56
  8. 8.Circle: diameter 8. Circumference = ? Answer: 25.12
  9. 9.Circle: radius 10. Circumference = ? Answer: 62.8
  10. 10.Circle: diameter 6. Circumference = ? Answer: 18.84
  11. 11.Circle: radius 4. Circumference = ? Answer: 25.12
  12. 12.Circle: diameter 12. Circumference = ? Answer: 37.68
  13. 13.Circle: radius 6. Circumference = ? Answer: 37.68
  14. 14.Circle: diameter 16. Circumference = ? Answer: 50.24
  15. 15.Circle: radius 8. Circumference = ? Answer: 50.24
  16. 16.Circle: diameter 22. Circumference = ? Answer: 69.08
  17. 17.Circle: radius 9. Circumference = ? Answer: 56.52
  18. 18.Circle: diameter 18. Circumference = ? Answer: 56.52
  19. 19.Circle: radius 15. Circumference = ? Answer: 94.2
  20. 20.Circle: diameter 30. Circumference = ? Answer: 94.2

About This Practice

This practice set includes 20 circumference problems. Understanding circle measurements is essential for geometry and real-world applications like wheel rotations and circular tracks.

Want more practice? See all Grade 6 practice →