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 Coordinate geometry Distance between two lines If the two lines intersect, then it is clear that D = 0 If they do not intersect and are parallel, then D corresponds to the distance between a point from one of the two lines and the other line and is given by the formula that find the distance from a point to a line. Find the distance between the lines r: 8x+6y+6=0 and s: 4x+3y+8=0 D =