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# Slopes of Parallel and Perpendicular Lines - Part I

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Author: M. J. Plott
##### Description:

Describes how to identify parallel and perpendicular lines using slope.

"Visit www.doucehouse.com for more videos like this. In this video, I explain how lines are parallel and perpendicular using slope. I discuss how parallel lines have the same slope, and how perpendicular lines have slopes that are negative reciprocals. I explain how to find the negative reciprocal of slopes. I go over 4 different example problems, one being plotting and proving lines are parallel and perpendicular just by using their slopes."

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Tutorial

Visit www.doucehouse.com for more videos like this. In this video, I explain how lines are parallel and perpendicular using slope. I discuss how parallel lines have the same slope, and how perpendicular lines have slopes that are negative reciprocals. I explain how to find the negative reciprocal of slopes. I go over 4 different example problems, one being plotting and proving lines are parallel and perpendicular just by using their slopes.