What do you create when you rotate a ray? An angle! Teach all the angle basics including naming, measuring, supplements, and complements. 

Create a strong understanding of the relationships formed when parallel lines intersect a transversal. Discuss each type of angle pair and their relationship to each other. 

Geometry is full of shapes, figures, and corresponding things here and there. The guide shares all of the key pieces of geometric information in a nicely color-coded and labeled sheet. 

The 20th installment in a series of 36 focuses on the characteristics of the p-block elements. Learners discuss, read about, and answer questions pertaining to the occurrence of these elements in nature, their electron configurations,...

Stuck trying to remember the formal language of a geometric proof? Never fear, this handout has them all ready to go. The reasons are sectioned by topic so this handy guide is ready when you are to tackle those two column proofs. 

Everything you wanted to know about angles and more, including 1) how to measure angles 2) types of angles 3) angle relationships and 4) angles around a transversal.

Brush up on your math skills relating to vertical angles then try some practice problems to test your understanding.

This study guide on angles covers key vocabulary, ways to name angles, how to measure them, the Protractor Postulate and the Angle Addition Postulate, types of angles, congruent angles, angle bisectors, and angle pairs. It is available...

Explains the basic concept of intersecting lines and angles with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Review the basics of vertical angles, and try some practice problems.

Intermath Dictionary's site defines terms relating to angles, gives examples, and offers interactive exercises.

Learn about vertical lines with this handy reference guide. Provides a detailed definition and examples that enhance further explanation. Includes links to related topics.

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

Find a quick, concise explanation of vertical angles. An example is given and clearly explained.

A list of geometry definitions and a matching activity.

Learn about alternate exterior angles with this handy reference guide. Provides a detailed definition and examples that enhance further explanation. Includes links to related topics.

This site from the Northeast Parallel Architectures Center, Syracuse University has a very substantial discussion of math topics slope & line equations. The outline form is quite useful if you need to zero in on one aspect of...

A review page discussing how to break down forces into the horizontal and vertical components when force is at an angle.