5:36 GCSE Maths - Alternate, Corresponding and Allied Angles - Parallel Lines Angle Rules (2026/27 exams)
Crisp UK explainer of alternate, corresponding and allied angles with the Z, F and C shapes.
Angle facts - parallel lines
Derive facts about angles between parallel lines and the transversal
5 hand-picked video lessons for this topic, each checked for relevance and clarity, graded by difficulty and labelled by depth. Press play to watch — nothing loads from YouTube until you do.
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10:42 Angles: Parallel Lines - Corbettmaths
Corbettmaths walks through alternate, corresponding and co-interior angles with clear exam-style examples.
33:34 Angles in Parallel Lines | Grade 5+ Series | GCSE Maths Tutor
Thorough UK tutor session covering every parallel-line angle rule and plenty of worked questions.
20:25 Angles in Parallel Lines
Maths Genie carefully finds missing angles using the parallel-line rules across many examples.
9:09 Calculating Angles on Parallel Lines
Clear demonstration of using each angle fact to calculate missing angles on parallel lines.