Freese's Dissection of a Dodecagram into a Hexagram
This Demonstration shows Freese's dissection of a dodecagram into a hexagram.
See "The 'Lost' Manuscript of Ernest Irving Freese" [1, pp. 24–28].
 G. N. Frederickson, Piano-Hinged Dissections: Time to Fold!, Wellesley, MA: A. K. Peters, 2006.