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Mathematics 20 Online
OpenStudy (anonymous):

Will give medal!!! Is the line through points P(-8, -10) and Q(-5, -12) perpendicular to the line through points R(9, -6) and S(17, -5)? Explain.

OpenStudy (immanuelv):

imo try to visualize it... that is the best method to solving this sort of problem

OpenStudy (immanuelv):

|dw:1414803870728:dw| my very very poorly drawn graph shows the possibility of perpendicularity if you are really far away. If you draw it properly you might get it :D

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