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Unformatted text preview: parallel to any line of slope 3 in the same plane, and it is perpendicular to any line of slope ± 1 3 in the same plane. • Also, any line of slope ± 4 7 is perpendicular to any line of slope 7 4 in the same plane. WARNING 2 : A pair of perpendicular lines may not “appear” perpendicular if the x- and y-axes are scaled differently....
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This document was uploaded on 12/29/2011.
- Spring '09