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Circumference of a circle

7th grade (Year 8 in England) · 16 questions · Common Core: 7.G.B.4 · England: KS3 Geometry, GCSE Foundation Geometry

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Date

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  1. Question 1

    A circle has radius 10 ft. Give its circumference in terms of π: it is kπ ft. What is k?

    Answer

  2. Question 2

    A circle has radius 14 cm. Find its circumference in cm. Use π ≈ 3.14159 (your calculator's π) and round to 1 decimal place.

    14 cm

    Answer

  3. Question 3

    A circle has radius 14 ft. Give its circumference in terms of π: it is kπ ft. What is k?

    Answer

  4. Question 4

    A circle has radius 11 ft. Find its circumference in ft. Use π ≈ 3.14159 (your calculator's π) and round to 1 decimal place.

    11 ft

    Answer

  5. Question 5

    A circle has radius 7 cm. Give its circumference in terms of π: it is kπ cm. What is k?

    Answer

  6. Question 6

    A circle has diameter 17 yd. Find its circumference in yd. Use π ≈ 3.14159 (your calculator's π) and round to 1 decimal place.

    Answer

  7. Question 7

    A circle has radius 2 cm. Give its circumference in terms of π: it is kπ cm. What is k?

    Answer

  8. Question 8

    A circle has diameter 16 m. Find its circumference in m. Use π ≈ 3.14159 (your calculator's π) and round to 1 decimal place.

    Answer

  9. Question 9

    A circle has radius 6 yd. Give its circumference in terms of π: it is kπ yd. What is k?

    Answer

  10. Question 10

    A circle has radius 14 cm. Find its circumference in cm. Use π ≈ 3.14159 (your calculator's π) and round to 1 decimal place.

    14 cm

    Answer

  11. Question 11

    A circle has radius 5 m. Give its circumference in terms of π: it is kπ m. What is k?

    Answer

  12. Question 12

    A circle has radius 7 yd. Find its circumference in yd. Use π ≈ 3.14159 (your calculator's π) and round to 1 decimal place.

    7 yd

    Answer

  13. Question 13

    A circle has radius 2 ft. Give its circumference in terms of π: it is kπ ft. What is k?

    Answer

  14. Question 14

    A circle has diameter 19 ft. Find its circumference in ft. Use π ≈ 3.14159 (your calculator's π) and round to 1 decimal place.

    Answer

  15. Question 15

    A circle has radius 7 cm. Give its circumference in terms of π: it is kπ cm. What is k?

    Answer

  16. Question 16

    A circle has radius 7 ft. Find its circumference in ft. Use π ≈ 3.14159 (your calculator's π) and round to 1 decimal place.

    7 ft

    Answer

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Answer key: Circumference of a circle

  1. 1. 20

  2. 2. 88

  3. 3. 28

  4. 4. 69.1

  5. 5. 14

  6. 6. 53.4

  7. 7. 4

  8. 8. 50.3

  9. 9. 12

  10. 10. 88

  11. 11. 10

  12. 12. 44

  13. 13. 4

  14. 14. 59.7

  15. 15. 14

  16. 16. 44