Parallel and Perpendicular Lines – Edexcel IAL Pure 1 (Chapter 5.3) – Complete Lesson

A complete, fully animated PowerPoint lesson on parallel and perpendicular lines for Edexcel IAL Pure 1 (Chapter 5.3). Perpendicular gradients are shown three ways, the negative reciprocal, m₁ × m₂ = −1 and ‘flip it and change the sign’, with the last recommended. Graphs are drawn to scale so perpendicular lines really meet at right angles. Five step-by-step worked examples cover testing whether lines are parallel or perpendicular, finding parallel and perpendicular lines, and finding where two lines meet by solving simultaneous equations. Three practice slides, ending with six exam-style questions that get harder.

What’s inside (18 slides): learning objectives, a starter, explanations, worked examples revealed one line at a time with graphs drawn live, common mistakes shown as wrong and right sketches, practice with answers, an exam-style question with a full M1/A1 mark scheme, and an exit ticket.

All questions are original. Matches the Pearson Edexcel IAL Pure Mathematics 1 textbook (Exercises 5E and 5F). Watch me teach the lessons on YouTube: @mredinemaths.