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

-intercept), it is a Bifolium. At the center, or anywhere on the inscribed Equilateral Triangle, it is a Trifolium.