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Formula and description of the perimeter of a parallelogram.

Parallel Lines, and Pairs of Angles

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

In this Early Edge video lesson, you'll learn more about Transversals and Parallel Lines, so you can be successful when you take on high-school Math & Geometry.

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