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Area of a circle from the radius

Year 8 maths · Fieldbook Learning

Name ______________________ Date __________

Area = π × radius × radius, with π = 3.14. Halve a diametre to get the radius.

  1. A circle has a radius of 22 cm. Find its area. Use π = 3.14.
  2. A circle has a radius of 12 cm. Find its area. Use π = 3.14.
  3. A circle has a radius of 38 cm. Find its area. Use π = 3.14.
  4. A circle has a radius of 51 cm. Find its area. Use π = 3.14.
  5. A circle has a radius of 80 cm. Find its area. Use π = 3.14.
  6. A circle has a radius of 20 cm. Find its area. Use π = 3.14.
  7. A circle has a radius of 45 cm. Find its area. Use π = 3.14.
  8. A circle has a radius of 39 cm. Find its area. Use π = 3.14.
  9. A circle has a radius of 32 cm. Find its area. Use π = 3.14.
  10. A circle has a radius of 3 cm. Find its area. Use π = 3.14.
  11. A circle has a radius of 5 cm. Find its area. Use π = 3.14.
  12. A circle has a radius of 15 cm. Find its area. Use π = 3.14.
  13. A circle has a radius of 13 cm. Find its area. Use π = 3.14.
  14. A circle has a radius of 85 cm. Find its area. Use π = 3.14.
  15. A circle has a radius of 34 cm. Find its area. Use π = 3.14.
  16. A circle has a radius of 112 cm. Find its area. Use π = 3.14.
  17. A circle has a radius of 79 cm. Find its area. Use π = 3.14.
  18. A circle has a radius of 110 cm. Find its area. Use π = 3.14.
  19. A circle has a radius of 106 cm. Find its area. Use π = 3.14.
  20. A circle has a radius of 131 cm. Find its area. Use π = 3.14.
More free practice: fieldbooklearning.com/uk/practice/year-8/area-of-a-circle-from-the-radius/

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Answer key: Area of a circle from the radius

  1. 1519.76
  2. 452.16
  3. 4534.16
  4. 8167.14
  5. 20096
  6. 1256
  7. 6358.5
  8. 4775.94
  9. 3215.36
  10. 28.26
  11. 78.5
  12. 706.5
  13. 530.66
  14. 22686.5
  15. 3629.84
  16. 39388.16
  17. 19596.74
  18. 37994
  19. 35281.04
  20. 53885.54