May 13, 2015

This Youtube video from Don Estabrook explains what similar triangles are and three theorems that can be used to prove that two triangles must be similar (AA, SAS & SSS). Uses mulitple examples for each theorem.

- Mathematics > General
- Mathematics > Geometry

- Grade 9
- Grade 10

Reason abstractly and quantitatively.

Construct viable arguments and critique the reasoning of others.

Use appropriate tools strategically.

Attend to precision.

Look for and make use of structure.

Use the properties of similarity transformations to establish the AA criterion for two triangles to be similar.