At a glance
6
Occurrences
questions
4
Years
6
Papers
6
Worked
100%
When this method shows up
Years in which at least one question on this paper triggers the method.
Other top methods in Coordinate Geometry & Circles
- Perpendicular means negative-reciprocal gradient, and a perpendicular bisector is that gradient through the midpoint×5
- Turn a tangency, a single-intersection, or an existence statement into a discriminant or a distance-equals-radius condition×4
- Reduce any two-circle (or point-to-circle) problem to the distance between centres plus or minus the radii×4
- Replace a circle by its centre and radius and use the defining geometric fact, not the full equation×3
- Find awkward lengths and areas by cutting the figure into elementary triangles, and unfold 3D surfaces flat×3
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