- John Williams
Hopefully you noticed that the two circles stayed congruent, no matter where you dragged the points. We call this the 'drag test'. If you make something in GeoGebra and it maintains its characteristics no matter where you drag the points, then it passes the drag test. See if you can make a square that passes the drag test. You may use any tool you like. You have probably noticed that all the tools have instructions that pop up when you click a tool.