Pairs or small groups work together to determine the height of a tree using similar triangles. Learners make a judgement which direction to let a tree fall to avoid hitting any structures. They then write letters to the principal...

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.

This lesson will demonstrate the use of CPCTC in triangle congruency proofs.

Solve geometry problems with various polygons by using all you know about similarity and congruence.

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