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Demonstrations 1  20 of 104
The Ellipse Problem of Steinhaus
Tilt of the Earth
Parabolograph
Hyperboloids and Ellipsoids
Lens Aberrations
Modeling the Hyperboloid of One Sheet
Paper Model of Conic Sections
FocusDirectrix Property of an Ellipse with Dandelin Spheres
Ellipse Rolling around Another Ellipse
Ellipse Rolling around a Circle
Euler's Substitutions for the Integral of a Particular Function
Draw Your Smiley Face
Da Vinci's Construction of an Ellipse
PaperFolding an Ellipse
Boundary Value Problems for Cone Geodesics
Plane Cross Sections of the Surface of a Cone
Length of an Arc of an Ellipse and the Area It Subtends
The Sum of Two CounterRotating Circular Vectors Is an Ellipse
Liquid Mirror
Separating Points by a Line or Parabola
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