GCSE Maths: Sectors & Arcs
Calculate arc lengths and areas of sectors of circles. Practise it with adaptive questions for AQA, Edexcel, OCR and Eduqas.
What you need to know
The concepts examiners test on sectors & arcs, and what each one is really asking.
Where marks get lost
The exam technique that separates a correct method from a correct answer.
- Forgetting to add the two radii when asked for the PERIMETER of a sector
- Using the area formula when asked for arc length
- Plugging numbers into the calculator wrong (do fraction × pi × radius squared)
Sectors & Arcs questions students ask
Is Sectors & Arcs on the Foundation paper?
Yes. Sectors & Arcs appears at both Foundation and Higher tier, though Higher papers take it further.
What should I know before starting Sectors & Arcs?
It builds on Area & Circumference of circles and Fractions. If those feel shaky, practise them first — Sectors & Arcs questions assume them.
What is the most common mistake in Sectors & Arcs?
Forgetting to add the two radii when asked for the PERIMETER of a sector.
Which exam boards cover Sectors & Arcs?
All four we support — AQA, Edexcel, OCR and Eduqas. GCSE Maths subject content is set by the DfE, so the topic is common to every board; what changes is the paper structure and the grade boundaries.