Parallels

Sort by:
Formula and description of the perimeter of a parallelogram.

Parallel Lines, and Pairs of Angles

A helpful scientific calculator that runs in your web browser window.

This interactive quiz allows you to test your knowledge on complementary and supplementary angles, as well as all the special angle pairs with the transversal of parallel lines.

This site outlines the theorems about parallelograms with proofs to these theorems.

A page with links for properties of circles and different types of polygons. Each link has great visuals with clear markings, definitions, and formulas.

An interactive applet showing the way the angle values change but the relationship between angle pairs does not.

This game (similar to "Who Wants to be a Millionaire") reviews parallel and perpendicular lines and their slopes.

This "Jeopardy-like" game reviews basic geometry vocabulary and parallel lines/angles vocabulary