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Unformatted text preview: lines are defined, then they are perpendicular, if the product of the two slopes is negative one (-1). If the slope of one of the lines is undefined, vertical, and the other is zero, horizontal, then they are also perpendicular....
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This note was uploaded on 10/28/2009 for the course MATH 116 taught by Professor Jess during the Spring '09 term at University of Arizona- Tucson.
- Spring '09