Cissoid of Diocles Pedal Curve

$\begin{figure}\begin{center}\BoxedEPSF{CissoidPedal1.epsf scaled 800}\qquad\BoxedEPSF{CissoidPedal4.epsf scaled 800}\end{center}\end{figure}$

The Pedal Curve of the cissoid, when the Pedal Point is on the axis beyond the Asymptote at a distance from the cusp which is four times that of the Asymptote is a Cardioid.