4:44 18. Similar Triangles Proof (GCSE Maths - Edexcel Practice Tests Set 3 - 1H)
A worked Edexcel exam question showing how to write out a full similar-triangles proof.
Proving similarity
Prove shapes are similar
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.
Sort
Level
Length
Origin
3 shown 4:44 
29:23 Triangle Similarity - AA SSS SAS & AAA Postulates, Proving Similar Triangles, Two Column Proofs
Thorough walkthrough of the AA, SSS and SAS rules with many worked proofs of similar triangles.
31:47 Geometric Proof | Grade 9 Playlist | GCSE Maths Tutor
Higher-tier techniques for building formal geometric proofs, including similar-triangle arguments.