Download Article Show Download Article Equations of perpendicular lines are usually introduced in the beginning of geometry or algebra, and are the starting points of many mathematical concepts. Some students may find them complex, but with this guide, you can find perpendicular lines with ease! Steps
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About This ArticleThanks to all authors for creating a page that has been read 96,612 times. Did this article help you?Get all the best how-tos! Sign up for wikiHow's weekly email newsletter Subscribe You're all set! What is the slope of a line perpendicular to line P?The slope of a perpendicular line from the slope of a given line is obtained by taking the negative reciprocal of the slope of the given line. If the slope of the given line is m1 and the slope of a perpendicular line is m2 then we have m2 = -1/m1.
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