If x1,x2,x3 as well as y1,y2,y3 are in G...

If `x_1,x_2,x_3` as well as `y_1,y_2,y_3` are in `G P` with the same common ratio, then the points `(x_1,y_1),(x_2,y_2),` and `(x_3, y_3)dot` (a)lie on a straight line (b)lie on an ellipse (c)lie on a circle (d) are the vertices of a triangle.

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