Mathematics A-Level
Parallel and perpendicular lines
What Parallel and perpendicular lines means in Mathematics A-Level, as defined for AQA.
Definition of Parallel and perpendicular lines
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Reference: AQA
For two lines, parallel means equal gradients, while perpendicular means gradients multiply to −1, unless one is vertical and the other horizontal.
Topics that use Parallel and perpendicular lines
- C: Coordinate geometry in the (x, y) plane (AQA A-Level)
Related terms
- Completing the square
- curve sketching
- Eliminating the parameter
- Gradients and intercepts
- Mathematical modelling
- Parameter
- parametric equations
- Tangent and chord relationships
Using Parallel and perpendicular lines in the exam
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