Solving Triangle Problems – Edexcel IAL Pure 1 (Chapter 6.4) – Complete Lesson

A complete lesson on choosing and combining SOH CAH TOA, the sine rule and the cosine rule in context. Bearing diagrams are drawn live with north lines, and the angle inside the triangle is found with co-interior angles and angles around a point. Worked examples cover a two-leg journey, a bearing found with the sine rule, angles of elevation to the top of a tower, and the area of a quadrilateral split into two triangles. Three practice slides on bearings with diagrams already drawn, plus a practice slide on heights and areas.

Fully animated PowerPoint lesson, ready to teach from or to use for revision. Every worked example is revealed one line at a time, and diagrams and graphs are drawn live, so students see each step as you explain it. Includes learning objectives, a starter, common mistakes, 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. Watch me teach the lessons on YouTube: @mredinemaths.