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January 30, 2015

January 30, 2015

Posted by **stacy** on Wednesday, February 14, 2007 at 8:58pm.

Compute the slopes of the two lines. If the product of the slopes is -1, then te lines are perpendicular.

In your case, the first line has a slope of m = (6-3)/(11-2)= 1/3 and the second line has a slope of

m = (18-3)/(-3 -2) = 15/(-5) = ?

You finish it.

You could also do the problem graphically by plotting the points, drawing the lines and using a protractor.

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