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April 21, 2014

April 21, 2014

Posted by **cassie** on Thursday, July 7, 2011 at 5:53pm.

Based on the slope of these lines, are they parallel, perpendicular or neither?

- geomerty -
**Henry**, Friday, July 8, 2011 at 9:17pm(0,-2),(1,3).

(3,-1),(-2,0).

m1 = (3-(-2)) / (1-0) = 5/1 = 5.

m2 = (0-(-1)) / (-2-3) = 1/-5 = -1/5.

mi and m2 are negative reciprocals of each other.Therefore, the lines are

perpendicular.

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