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Demonstrations 21 - 40 of 110
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
Implicit Function Transformations Quiz
The Ellipsograph, a Mechanism for Constructing an Ellipse
Dandelin Spheres for an Ellipse
Area under a Parabola by Symmetries
The Parabola's Evil Twin: Real and Nonreal Roots of a Real Quadratic
Tangents to a Rotating Ellipse
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