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Deltoid Pedal Curve

\begin{figure}\begin{center}\BoxedEPSF{DeltoidPedalCusp.epsf scaled 500}\BoxedEP...
...caled 500}\BoxedEPSF{DeltoidPedalCenter.epsf scaled 500}\end{center}\end{figure}

The Pedal Curve for a Deltoid with the Pedal Point at the Cusp is a Folium. For the Pedal Point at the Cusp (Negative $x$-intercept), it is a Bifolium. At the center, or anywhere on the inscribed Equilateral Triangle, it is a Trifolium.

© 1996-9 Eric W. Weisstein