Pg444 #6e. Author:David Petro. GeoGebra Applet Press Enter to start activity. New Resources. Limaçon / Cardioid as a Locus - A Classical Construction Pg444 #6e. Author: David Petro. GeoGebra Applet Press Enter to start activity. New Resources. Limaçon / Cardioid as a Locus - A Classical Construction หนึ่งในคุณสมบัติที่น่าสน