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Astroid Involute

\begin{figure}\begin{center}\BoxedEPSF{AstroidInvolute.epsf scaled 700}\end{center}\end{figure}

A Hypocycloid Involute for $n=4$ is another Astroid scaled by a factor $(n-2)/n=2/4=1/2$ and rotated $1/(2\cdot 4)=1/8$ of a turn.



© 1996-9 Eric W. Weisstein
1999-05-25