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Unformatted text preview: For example, the lines (x = 5) and (y = 3) are perpendicular. Otherwise, how can we tell whether two lines are perpendicular? Consider a line AB with slope a/b. Then think of rotating the line 90 degrees to get a line A1B1 perpendicular to AB. For the new line, the rise and the run are interchanged, but the run is now negative. Thus the slope of the new line is b/a, which is the opposite of the reciprocal of the slope of the first line. Also note that when we multiply the slopes we get 1. a/b (b/a) = 1...
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This note was uploaded on 06/26/2011 for the course MAT 116 taught by Professor Universityofphoenix during the Spring '09 term at University of Phoenix.
 Spring '09
 UniversityofPhoenix
 Algebra, Slope

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