Diameter
What Diameter means in Mathematics GCSE, as defined for AQA, Pearson Edexcel.
Definitions of Diameter
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 Diameter in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
A straight-line distance across a circle or sphere through its centre; equal to twice its radius.
A chord passing through the centre, or the length of that chord; its length is twice the radius.
A chord passing through the centre of the circle; its length is twice the radius.
A chord passing through the centre of a circle; its length is twice the radius.
A chord that passes through the centre; its length is twice the radius.
Topics that use Diameter
- Mensuration and calculation (AQA GCSE)
- Properties and constructions (AQA GCSE)
- Geometry and measures - Mensuration and calculation (Pearson Edexcel GCSE)
- Geometry and measures - Properties and constructions (Pearson Edexcel GCSE)
Related terms
Using Diameter 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.
A week of Premium from your first lesson · Then the free plan continues · No card, no charge