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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Tube at distance of a 3D curve.
רישום חופשי
Snake year !
Constructing the Copy of an Angle + Angles Activities
Constructing an Isosceles Triangle with Given Side + Activities

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Geometry Unit 2
US Healthcare Simulation (1-prop z)
Trig Ratios on the Unit Circle
Pythagoras
พื้นที่ผิวในปริภูมิ 3 มิติ

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Polynomial Functions
Parabola
Confidence Interval
Curve Sketching
Translation