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Analytical Geometry (Co ordinates)

Distance between P and Q is PQ =

The point which divides the join of Pand Q internally in the ratio m : n is

the point with co ordinates

The midpoint of line joining P and Q is .

The slope of a line is defined as m = tan q , where q is angle made by the line with the positive direction of the x-axis.

The slope of the line joining Pand Q is m = .