5:36 GCSE Maths - Alternate, Corresponding and Allied Angles - Parallel Lines Angle Rules (2026/27 exams)
Cognito's crisp run-through of alternate (Z), corresponding (F) and co-interior (C) angle rules.
Identify corresponding, alternate and co-interior angles
Identify and calculate co-interior, alternate and corresponding angles
3 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' thorough tutorial covering all three rules plus exam-style missing-angle examples.
2:47 Alternate Angles, Corresponding Angles, Co-interior Angles - Nerdstudy
Quick, clear Nerdstudy summary of all three parallel-line angle relationships in under three minutes.