Each of the images below is a link to a dynamic geogebra applet. The blue “circular” points are movable.
These applets are gathered in this this geogebra book.
right strophoid

cardioid

Each of the images below is a link to a dynamic geogebra applet. The blue “circular” points are movable.
These applets are gathered in this this geogebra book.
right strophoid
cardioid