AQA GCSE Mathematics · 8300
Specification G3 · Paper 1, Paper 2, Paper 3
Angles at different intersections on opposite sides of a transversal, either both between the two lines or both outside them. They are equal when those lines are parallel.
Revise: Alternate and Corresponding Angles on Parallel LinesAlternate angles lie at different intersections on opposite sides of the transversal. They must also be either both inside the parallel lines or both outside them. Both types are equal when the lines are parallel.