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Find the area and circumference of circles in terms of pi

Year 10 maths · Fieldbook Learning

Name ______________________ Date __________

Circumference is 2πr; area is πr². Leave π in the answer.

  1. A circle has a diametre of 36 cm. What is its circumference? Write it as a multiple of π, like 10π.
  2. A circle has a diametre of 4 cm. What is its circumference? Write it as a multiple of π, like 10π.
  3. A circle has a diametre of 52 cm. What is its circumference? Write it as a multiple of π, like 10π.
  4. A circle has a diametre of 56 cm. What is its circumference? Write it as a multiple of π, like 10π.
  5. A circle has a radius of 13 cm. What is its area? Write it as a multiple of π, like 25π.
  6. A circle has a radius of 18 cm. What is its area? Write it as a multiple of π, like 25π.
  7. A circle has a radius of 17 cm. What is its area? Write it as a multiple of π, like 25π.
  8. A circle has a diametre of 18 cm. What is its area? Write it as a multiple of π, like 25π.
  9. A circle has a diametre of 32 cm. What is its circumference? Write it as a multiple of π, like 10π.
  10. A circle has a radius of 9 cm. What is its circumference? Write it as a multiple of π, like 10π.
  11. A circle has a radius of 6 cm. What is its circumference? Write it as a multiple of π, like 10π.
  12. A circle has a diametre of 18 cm. What is its circumference? Write it as a multiple of π, like 10π.
  13. A circle has a radius of 16 cm. What is its area? Write it as a multiple of π, like 25π.
  14. A circle has a radius of 31 cm. What is its area? Write it as a multiple of π, like 25π.
  15. A circle has a radius of 29 cm. What is its area? Write it as a multiple of π, like 25π.
  16. A circle has a radius of 35 cm. What is its area? Write it as a multiple of π, like 25π.
  17. A circle has a radius of 23 cm. What is its area? Write it as a multiple of π, like 25π.
  18. A circle has a radius of 21 cm. What is its area? Write it as a multiple of π, like 25π.
  19. A circle has a diametre of 24 cm. What is its area? Write it as a multiple of π, like 25π.
  20. A circle has a diametre of 6 cm. What is its area? Write it as a multiple of π, like 25π.
More free practice: fieldbooklearning.com/au/practice/year-10/circles-area-and-circumference-in-terms-of-pi/

Answer key: Find the area and circumference of circles in terms of pi

  1. 36π
  2. 4π
  3. 52π
  4. 56π
  5. 169π
  6. 324π
  7. 289π
  8. 81π
  9. 32π
  10. 18π
  11. 12π
  12. 18π
  13. 256π
  14. 961π
  15. 841π
  16. 1225π
  17. 529π
  18. 441π
  19. 144π
  20. 9π