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Mathematics 21 Online
OpenStudy (anonymous):

Find the value of t if AB is perpendicular to CD A(-1,-3) B(1,-4) C(6,3) D(t,5) Please help

OpenStudy (anonymous):

find the slope of AB then slope of CD = -1/slope of AB equate slope of CD to this value just found to give an equation in t solve to get value of t

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