Cardioid motion can be defined by rolling the circle on the outside of the fixed circle which is inside the rolling circle.[br]Radius of the moving circle is double radius of the fixed circle that is the cardioid motion is special case of pericycloidal motion.[br]The paths of points which are obtained by this motion are limaçon of Pascal or circle, in special case limaçon of Pascal is cardioid.

(c) Petra Surynková[br][br]For more GeoGebra worksheets on kinematics see[br][url]http://www.surynkova.info/geogebra.php[/url]