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Area of a circle from the diametre

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 diametre of 94 cm. Find its area. Use π = 3.14.
  2. A circle has a diametre of 70 cm. Find its area. Use π = 3.14.
  3. A circle has a diametre of 110 cm. Find its area. Use π = 3.14.
  4. A circle has a diametre of 48 cm. Find its area. Use π = 3.14.
  5. A circle has a diametre of 54 cm. Find its area. Use π = 3.14.
  6. A circle has a diametre of 150 cm. Find its area. Use π = 3.14.
  7. A circle has a diametre of 20 cm. Find its area. Use π = 3.14.
  8. A circle has a diametre of 44 cm. Find its area. Use π = 3.14.
  9. A circle has a diametre of 56 cm. Find its area. Use π = 3.14.
  10. A circle has a diametre of 156 cm. Find its area. Use π = 3.14.
  11. A circle has a diametre of 170 cm. Find its area. Use π = 3.14.
  12. A circle has a diametre of 66 cm. Find its area. Use π = 3.14.
  13. A circle has a diametre of 158 cm. Find its area. Use π = 3.14.
  14. A circle has a diametre of 108 cm. Find its area. Use π = 3.14.
  15. A circle has a diametre of 58 cm. Find its area. Use π = 3.14.
  16. A circle has a diametre of 118 cm. Find its area. Use π = 3.14.
  17. A circle has a diametre of 234 cm. Find its area. Use π = 3.14.
  18. A circle has a diametre of 166 cm. Find its area. Use π = 3.14.
  19. A circle has a diametre of 116 cm. Find its area. Use π = 3.14.
  20. A circle has a diametre of 150 cm. Find its area. Use π = 3.14.
More free practice: fieldbooklearning.com/uk/practice/year-8/area-of-a-circle-from-the-diameter/

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Answer key: Area of a circle from the diametre

  1. 6936.26
  2. 3846.5
  3. 9498.5
  4. 1808.64
  5. 2289.06
  6. 17662.5
  7. 314
  8. 1519.76
  9. 2461.76
  10. 19103.76
  11. 22686.5
  12. 3419.46
  13. 19596.74
  14. 9156.24
  15. 2640.74
  16. 10930.34
  17. 42983.46
  18. 21631.46
  19. 10562.96
  20. 17662.5