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Demonstrations 21  40 of 129
Drawing Some Plane Curves Using Envelopes of Lines
Spherical Cycloids Generated by One Cone Rolling on Another
Balloon Dog
Launching a Projectile on a Sloped Surface
Cylinder and Cone Sectors
Inverting a Point in the Osculating Circles of a Curve
Quadrics
Flow Time in an Hourglass
Isoptic Curves of an Ellipse
Definition and Equations of an Ellipse
Liquid Mirror
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
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