Investigate how similar and congruent figures compare. Learners understand congruent figures have congruent sides and angles, but similar figures only have congruent angles — their sides are proportional. After learning the...

A complete reference guide to similar triangles and polygons. It provides definitions and interactive activities that enhance further explanation.

[Free Registration/Login may be required to access all resource tools.] This study guide looks at similar polygons, scale factor (ratio), and triangle similarity.

Explains the basic terminology and formatting of ratios, and demonstrates how to solve typical exercises.

Explains the basics and terminology of proportions.