
 Math Trek: Rolling with Reuleaux, Science News Online, Sept. 20, 2003 (Site not responding. Last check: 20071008) 
  The resulting "curved triangle," as Reuleaux termed it, has a constant width equal to the length of the interior triangle's side. 
  Moreover, a curve of constant width need not be symmetrical or even consist of circular arcs. 
  Therefore, an unlimited number of curves of constant width are possible, and the Reuleaux triangle happens to be the family member of least area. 
 www.sciencenews.org /articles/20030920/mathtrek.asp (998 words) 
