Circle, Ellipse, Hyperbola, and Astroid
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This Demonstration uses parametric equations to plot circles, ellipses, hyperbolas with their asymptotes, and astroids.
Contributed by: Milana Dabic (March 2011)
Open content licensed under CC BY-NC-SA
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"Circle, Ellipse, Hyperbola, and Astroid"
http://demonstrations.wolfram.com/CircleEllipseHyperbolaAndAstroid/
Wolfram Demonstrations Project
Published: March 7 2011