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Demonstrations 1 - 20 of 98
Focus-Directrix Property of an Ellipse with Dandelin Spheres
New this month
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
Paper-Folding 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 Counter-Rotating Circular Vectors Is an Ellipse
Separating Points by a Line or Parabola
A General Cone
Locating the Complex Roots of a Quadratic Equation
Caustics Generated by Rolling Circles
Practice Identifying Surfaces of Degree at Most Two
Numerical Iso-Optic Curve of the Ellipse
Iso-Optic Curve of the Ellipse
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