This study guide on lines and angles covers key terminology; line notation; parallel, perpendicular, and skew lines; and postulates and theorems about lines. It is available for download with free registration.

Explore some problems you can solve with your knowledge of triangles and trigonometry.

The purpose of this activity 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...

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.

Use this calculator to find the unknown angles in a right triangle using the Pythagorean Theorem. Once you know the sides you can calculate the perimeter, semiperimeter, area, and the altitudes.

This is an inquiry lesson used to review Algebra 1 objectives by applying them to geometry concepts. Learners explore the properties of quadrilaterals and classify them by definition. This lesson can be use in geometry classes. Students...