A GeoGebra model of the Classic Pappus Chain of Circles on an Arbelos. AB defines the diameter of the big semicircle; AC the diameter of the left semicircle. Please drag the slider [b]DrawPappusCircles [/b]to adjust the number of Pappus circles.
There are numerous fascinating facts around the Arbelos. For more information, consult http://mathworld.wolfram.com/PappusChain.html Lingguo Bu (lgbu@siu.edu)