Dandelin's theorem in stereo

Topic:Cone

* 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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גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
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bewijs stelling van Pythagoras
apec

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