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Astroid
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== External links == {{commons category|Astroid}} * {{springer|title=Astroid|id=p/a013540}} * [http://www-history.mcs.st-andrews.ac.uk/history/Curves/Astroid.html "Astroid" at The MacTutor History of Mathematics archive] * [http://www.mathcurve.com/courbes2d.gb/astroid/astroid.shtml "Astroid" at The Encyclopedia of Remarkable Mathematical Forms] * [https://web.archive.org/web/20170824133613/http://www.2dcurves.com/roulette/roulettea.html Article on 2dcurves.com] * [http://xahlee.org/SpecialPlaneCurves_dir/Astroid_dir/astroid.html Visual Dictionary Of Special Plane Curves, Xah Lee] * [http://demonstrations.wolfram.com/BarsOfAnAstroid/ Bars of an Astroid] by Sándor Kabai, [[The Wolfram Demonstrations Project]]. [[Category:Sextic curves]] [[Category:Roulettes (curve)]]
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