Khan Academy on a Stick
Similarity
-
Similar Triangle Basics
ccIntroduction to what it means for triangles to be similar
-
Similarity Postulates
ccThinking about what we need to know whether two triangles are similar
-
Similar Triangle Example Problems
ccMultiple examples looking for similarity of triangles
-
Similarity Example Problems
ccTwo example problems involving similarity
-
Similarity example where same side plays different roles
ccThe same side not corresponding to itself in two similar triangles
-
Challenging Similarity Problem
ccInteresting similarity problem where we don't have a lot of information to work with
-
Finding Area Using Similarity and Congruence
ccExample of using similarity and congruence to find the area of a triangle
Triangle similarity
This tutorial explains a similar (but not congruent) idea to congruency (if that last sentence made sense, you might not need this tutorial). Seriously, we'll take a rigorous look at similarity and think of some reasonable postulates for it. We'll then use these to prove some results and solve some problems. The fun must not stop!
-
Similar triangles
ccIntroduction to similar triangles
-
Similar triangles (part 2)
ccMore on similar triangles
Old school similarity
These videos may look similar (pun-intended) to videos in another playlist but they are older, rougher and arguably more charming. These are some of the original videos that Sal made on similarity. They are less formal than those in the "other" similarity tutorial, but, who knows, you might like them more.