Paper 2 · Co-ordinate Geometry of the Circle
⏱ Tested in 1 exam question since 2025
Lesson 4 of 9
The Circle 4 – Point of intersection of a line and a circle ( tangents, chords etc)
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- Find where a line meets a circle by substituting the line into the circle's equation
- Classify chord, tangent or miss from the discriminant b² − 4ac of the quadratic
- Prove no intersection two ways: b² − 4ac < 0, or perpendicular distance > radius
- Find the circle on a chord PQ as diameter: midpoint = centre, distance = radius
Most recent exam questions
- 2025 P2 Q2(b)
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