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...Coordinate geometry important formulas distance formula d x y midpoint slope m equation of a line intercept form mx b where and point on the parallel perpendicular lines in plane two non vertical are if only they have same product their slopes is other words must be opposite signs reciprocals example find length ab use r passes through s how do i approach this problem we looking to see ms each what does mean notice that therefore an for v w need compare put second so can identify both because...