Dandelin's theorem in stereo

Thème :Cône

* 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 ?

Nouvelles ressources

Untitled
Ogee Arch - Construction
Curves
A Happy Polar Leaf
Here comes the sun!

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Hallatala og skurðpunktur beinnar línu
starter : Find m<wsu
向量3
Sin título
Тригонометрические уравнения

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Termes
Théorie des Ensembles
Fonctions définies par Morceaux
Triangles
Rectangle