8:27 GCSE Maths - 5 Angle Rules to Know (2026/27 exams)
Cognito runs through the five core angle rules then a multi-step problem combining them.
Problem solving - angle facts
Use all known angle facts about points and lines to solve problems
2 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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33:34 Angles in Parallel Lines | Grade 5+ Series | GCSE Maths Tutor
Long, thorough walkthrough of parallel-line angle problems with plenty of worked exam-style questions.