Copia de Dandelin's theorem in stereo

Autor:Lorenzo Cubeles Blasco, Mathieu Blossier

* Move points A and B to change section of the cone * Spheres are tangent to the plane and to the cone * Move point P on the conic * When the conic is an ellipse, why is MP+PH constant ?

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Reflection = 180° Rotation about a Line
Triangle with 3 Right Angles
Circle Passing Through 3 Points
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Equation of Locus - Parabola

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Example 2
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Forum_f=5&t=38656_B_KontinuitätSchneideKreis
Triangle Area and Perimeter
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