Circles (Edexcel GCSE Maths): Quizzes

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Circles
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10 questions from this quiz

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What is the radius of a circle?

Distance from centre to edge

A circle has a radius of 7cm. What is its diameter?

14cm

What does the circumference of a circle measure?

The distance around the edge

Which formula calculates circumference using diameter?

C=πdC = \pi d

Which formula calculates circumference using radius?

C=2πrC = 2\pi r

What value of π\pi can you use for GCSE exams?

3.142

You're given the diameter. Which formula is most convenient?

C=πdC = \pi d

Do both circumference formulas give the same answer?

Yes, they always give the same answer

A circle has radius 8cm. What is its circumference (use π=3.142\pi = 3.142, 2 d.p.)?

50.27cm

When should you round your answer in circle calculations?

At the end of the calculation

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