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Demonstrations 21  40 of 112
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
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 IsoOptic Curve of the Ellipse
IsoOptic Curve of the Ellipse
Implicit Function Transformations Quiz
The Ellipsograph, a Mechanism for Constructing an Ellipse
Dandelin Spheres for an Ellipse
Area under a Parabola by Symmetries
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