Skip to content
    Mathematics GCSE

    arc length

    What arc length means in Mathematics GCSE, as defined for AQA, Pearson Edexcel.

    Definitions of arc length

    Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.

    Check what you remember

    Read the wording for your board, then hide it and explain arc length in your own words. Rough notes are fine. This is a self-check, with no mark or grade.

    Reference: AQA

    The length along the curved edge of a sector, found as (θ/360) × 2πr where θ is the angle at the centre in degrees.
    AQA · Mensuration and calculation (study guide)
    The fraction of a full turn, θ/360, multiplied by the whole circumference, 2πr.
    Pearson Edexcel · Geometry and measures - Mensuration and calculation (study guide)

    Topics that use arc length

    Related terms

    Using arc length in the exam

    Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.

    Practise Mathematics questions

    Create a free account to answer exam-style questions on this topic and get feedback on your answers.

    Start free

    A week of Premium from your first lesson · Then the free plan continues · No card, no charge

    All Mathematics GCSE terms