Rachel
About
Khan Academy on a Stick
Similar triangles
Introduction to similar triangles
Old school similarity
Similar triangles
Similar triangles (part 2)
Your browser does not support video. Please get the latest version of Google Chrome, Firefox, IE, or Safari. Alternately, you can try the link below if you have VLC or another media player installed.
If the above player doesn't work, you can
try this direct link
.