Crop circles challenge! Crop Circle photo courtesy The Crop Circle Connector (www.cropcircleconnector.com) Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and activated. (click here to install Java now)  Created using Geogebra and Graphics software Fabrizio De mola and Palmira Ronchi Maths teacher- ITCS "C. Vivante" Bari - ITALY, 18/10/2005