Work within a parallel universe. Scholars learn about the relationships of angles when two parallel lines are intersected by a transversal. They see how to find the measurements of all eight angles by knowing the measure of one angle....

Proofs may be as easy as 1, 2, 3 ... maybe. Pupils participate in creating four example proofs. The presentation uses a list of geometric properties to develop the proofs by filling in both the statements and reasons. Scholars practice...

How do you solve for an unknown angle? In this sixth installment of a 36-part series, young mathematicians use concepts learned in middle school geometry to set up and solve linear equations to find angle measures.

In this geometry instructional activity, 10th graders define vertical angles as it relates to interesting lines. There are 24 problems about solving vertical angles.

This activity from Shodor Education Foundation will help you learn or review your angle vocabulary.

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