# HP Prime for All

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ellipse(Point1, Point2, Point3) or ellipse(Point1, Point2, Realk)

Draws an ellipse, given the foci and either a point on the ellipse or a scalar that is one half the constant sum of the distances from a point on the ellipse to each of the foci.

ellipse(GA, GB, GC) draws the ellipse whose foci are points A and B and which passes through point C.
ellipse(GA, GB, 3) draws an ellipse whose foci are points A and B. For any point P on the ellipse, AP+BP=6.