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The Inscribed Ellipse with Foci H and O and Center N.

Author:
Steve Phelps
Topic:
Ellipse, Geometry
The orthocenter and circumcenter are the foci of an inscribe ellipse with center being the center of the nine-point circle. It is the envelope of the perpendicular bisector of H and a point on the circumcircle. Press PLAY to see the animation.

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