This site from the University of Saskatchewan provides an explanation of similar triangles, the Pythagorean theorem, and the distance between arbitrary points in a plane. Example problems for each of these concepts are provided.

[Free Registration/Login may be required to access all resource tools.] This study guide looks at several examples of self-similarity.

In this lesson, you will learn about the Pythagoras theorem, its derivations, and equations followed by solved real-world problems on the Pythagoras theorem triangle and squares.

The Chinese character mark formerly known as "Tan" is the first of two lessons to introduce first grade young scholars to geometry using tangrams. This lesson incorporates history, math, and language arts. In this lesson students will be...

Explains the basics and terminology of proportions.