Problems on Circles XI: Perpendicular Tangents to an Ellipse

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horizontal axis
vertical axis
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Draw the tangent to a point on an ellipse and the two tangents that are perpendicular to it. The locus of the intersection points of these lines is a circle.

External Links

Circle (Wolfram MathWorld)
Ellipse (Wolfram MathWorld)
Tangent Line (Wolfram MathWorld)
Perpendicular (Wolfram MathWorld)

Permanent Citation

Jaime Rangel-Mondragon
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​"Problems on Circles XI: Perpendicular Tangents to an Ellipse"​
​http://demonstrations.wolfram.com/ProblemsOnCirclesXIPerpendicularTangentsToAnEllipse/​
​Wolfram Demonstrations Project​
​Published: March 7, 2011