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.

Learn the many theorems about triangles that you can prove using similar triangles.

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.

[Free Registration/Login may be required to access all resource tools.] This study guide looks at the definitions and units for perimeter, area, and circumference, and at the perimeter and area of different shapes, including regular...

Eighth graders work with slopes and similar triangles in this problem and will learn why the calculated slope will be the same for any two points on a given line. Aligns with 8.EE.B.6.

The purpose of this lesson is to help students apply math concepts concerning similar triangles and trigonometric functions to real life situations. The students learn how to take these concepts and use them to find measurements of...

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.