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Point M is the midpoint on line RS.
The possible coordinates of the midpoint depend on the coordinates of A and T and these depend on what these two points are and how they are related.If A = (p,q) and T = (r,s ) then the midpoint of AT has coordinates [(p+r)/2, ((q+s)/2].
If R = (xr, yr) and P = (xp, yp) then the midpoint is [(xr + xp)/2, (yr + yp)/2].
it divides theline segment..xDusing midpoint formula..and division of line segment formula..m=(X1+X2)/2 (Y1+Y2)/2X=X1+r(X2-X1)xD ..
Suppose one end point is A and the midpoint is M. Then the distance from the given end to the midpoint is M-A. So the other end point is M-A further away from M ie it is at M + (M-A) = 2M-A. The above answer looks like it is for 1 dimensional problems only but for two or more dimensions, either treat A and M as vectors or (if you are not familiar with vectors), apply the same rule to the x-coordinate, then separately, to the y-coordinate, etc. So, in 2 dimensions, if A = (ax, ay) and M = (mx, my) then the other end point is (2mx- ax , 2my- ay) and similarly for more dimensions.