AQA · Mathematics · 8300

GCSE Maths: Circles: circumference

Geometry & Measures · AQA GCSE Maths (8300). Cards are generated from the Corbettmaths textbook exercise and practice questions for Circles: circumference (Corbettmaths Video 60), and every card links back to the exact page it came from. Practice tests are drawn from this deck’s own cards. Source material © Corbettmaths — used with attribution.

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  1. ? is the distance around the edge of a circle.

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    Circumference

  2. What is the formula for the circumference of a circle with radius r?

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    C = 2πr

  3. What does it mean to express a circumference 'in terms of π'?

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    Leave π as a symbol in the answer rather than calculating a decimal value.

  4. How do you find the diameter of a circle if you know the circumference?

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    Divide the circumference by π (d = C/π)

  5. What is the perimeter of a semicircle with radius r?

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    πr + 2r (half the circumference plus the diameter)

  6. If a runner completes one lap of a circular track, what distance have they traveled?

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    The circumference of the circle.

  7. What is the formula relating distance, speed, and time?

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    Distance = Speed × Time, or equivalently Speed = Distance ÷ Time.

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