Parallel Lines & Angle Rules

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About Course

Learn the basic angle facts and the three angle rules for parallel lines — alternate, corresponding and co-interior angles — and practise giving clear geometric reasons, as GCSE questions require.

This course is independent revision support and is not affiliated with any exam board. Always check your own exam board specification and past-paper guidance.

What Will You Learn?

  • Use angles on a line, around a point and in a triangle Identify alternate, corresponding and co-interior angles Recognise vertically opposite angles Write correct reasons in angle proofs

Course Content

Course Lessons

  • Basic Angle Facts
  • Angles in Parallel Lines
  • Giving Reasons

Sources & Further Reading
The official guidance this course is based on.

Final Assessment

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