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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problemagrafico-rescaled
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Renert Puzzle Aydin final
Congruencia y Semejanza de triángulos
axˆ2+bx+c=0
Basic problems on tangency

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