Posted by ashley on Saturday, July 14, 2012 at 9:35pm.
Triangle ΔABC has vertices A(2,5), B(8,1) and C(2,1) and is a right triangle. If the slope of AB is 2/3 and the slope of AC is 3/2, are the lines parallel, perpendicular or neither?

math  ashley, Saturday, July 14, 2012 at 9:35pm
i was thinking neither..im not sure though

math  Reiny, Saturday, July 14, 2012 at 10:43pm
If two lines are perpendicular, then their slopes are negative reciprocals of each other, or another way of looking at it, when their slopes are multiplied the result is 1
Is (2/3)(3/2) = 1 ???

math  ashley, Sunday, July 15, 2012 at 2:00pm
yes
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