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Prerequisites

- N6a – Using powers and roots
- N8b – Surds
- A2a – Substituting numerical values into formulae and expressions
- G9a – Circle parts – definitions and properties
- G20a – Pythagoras’ theorem

*x*and

*y*is essential. This is covered in:

# Recognising and using the equation of a circle with the centre at the origin

Teacher resources

Links to past exam questions

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