Teach budding mathematicians how to square a triangle with an interactive that shows a graphical proof of the Pythagorean Theorem. Pupils alter the lengths of the legs using sliders. Using the inputted lengths, the applet displays the...

Starting with similar triangles and dilation factors, this unit quickly and thoroughly progresses into the world of right triangle features and trigonometric relationships. Presented in easy-to-attack modules with copious application...

Test your knowledge on the attributes of triangles. There are eleven levels that may be completed with or without a timer.

Given two similar triangles and some of their side lengths, find a missing side length.

A complete reference guide to congruent triangles. It provides definitions, examples, and an interactive activity that enhances further explanation. Includes links to related topics.

Finding the third angle of a triangle becomes easier by the explanation and examples presented.