Solutions · Grade 10-11 · 26 pages · PDF
TrianglesSolutions
Every worksheet question worked in full.
A concise 16-page IGCSE guide to triangles. It covers classifying triangles by their sides and by their angles, the properties of isosceles triangles, the angle sum (including algebraic angle problems) and the exterior angle theorem. It then teaches the area of a triangle using base and height, with Heron’s formula as an extension. It also covers Pythagoras’ theorem and its converse for testing whether a triangle is acute, right-angled or obtuse, and the triangle inequality. Every method comes with clear diagrams and step-by-step worked examples. It ends with a summary, a keyword guide and exam tips.
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Main Notes · 17 pages
Main Notes
The full notes: one idea per page, a worked example beside every rule.
Read the first 4 pages€9.99Cheatsheet · 1 page
Cheatsheet
The whole topic on a page or two, for the night before.
Read the first pageFreeWorksheet · 30 pages
Worksheet
Practice questions in the order the notes teach them.
Read the first 4 pages€11.99