Geometry-Proving triangles are similar AA . SAS . SSS

3,532 views · Published 3 December 2017 · 25:40 · Indexed 4 November 2026

Channel: MooMooMath and Science · 2017 · Education

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In this video, I show how to prove triangles are similar.
I cover the Angle-Angle Postulate ( AA)
The Side Angle Side Postulate ( SAS)
The Side Side Side Postulate ( SSS)
The video is kinda long so this guide may help.

0:31 Introduction similar triangles
0:31 Angle Angle Postulate
1:15 Side Angle Side Postulate
2:35 Side Side Side Postulate
4:05 Sample Problem
Explain why the triangles are similar and write a similarity statement.
12:48 Explain why the triangles are similar and find each length.

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