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Cambridge IGCSE Additional Mathematics

8.1The equation of a circle

The equation of a circle in Cambridge IGCSE Additional Mathematics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic20 practice questions1 lesson
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Learning objectives

What the syllabus expects you to be able to do.

  1. 8.1Know and use the equation of a circle with given centre and radius, in any form.

Lessons

  • The equation of a circle

    35 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

The equation of a circle: sample question

1 mark

Find the radius of the circle x2+y2−6x+2y−15=0x^2 + y^2 - 6x + 2y - 15 = 0.

Only if the answer has a unit, e.g. cm or km/h.

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