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OpenStudy (anonymous):
How do you use the slope to prove lines are parallel or perpendicular?
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OpenStudy (anonymous):
@AlexandervonHumboldt2
OpenStudy (alexandervonhumboldt2):
if the slope of lines is the same then they are parallel
OpenStudy (bibby):
parallel lines have the same slope perpendicular lines have slopes that are negative reciprocals of each other
OpenStudy (alexandervonhumboldt2):
if slope are negative recirpocals then lines are perpendicular
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