From plank@cs.utk.edu Fri Jun 14 08:51:12 1996 Return-Path: Received: from plank.cs.utk.edu (PLANK.CS.UTK.EDU [128.169.95.107]) by CS.UTK.EDU with ESMTP (cf v2.9s-UTK) id IAA16118; Fri, 14 Jun 1996 08:51:10 -0400 From: Jim Plank Received: by plank.cs.utk.edu (cf v2.11c-UTK) id IAA26622; Fri, 14 Jun 1996 08:51:08 -0400 Date: Fri, 14 Jun 1996 08:51:08 -0400 Message-Id: <199606141251.IAA26622@plank.cs.utk.edu> To: tibbs@hpc.uh.edu Subject: Re: Your compound dodecagon thing Status: R Hi Jason -- that figure is made from 180 pieces -- 60 of each of three types: Here's the normal pe--pe module A C -------------------------------------------- |\ ------ \ | | \ ------ \ | | \ ------ \ | | \ ------ \ | | \ ------ \| -------------------------------------------- B D Type one (blue in the picture): AB, BC and CD are all valley folds. Type two (purple in the picture): AB, and BC are valley folds. CD is a mountain fold. Type three (red in the picture): AB is a valley fold. BC and CD are a mountain folds. There is no internal structure. Make 12 pentagons with the type one modules only. Then use the type two modules (the AB tab) to turn the 12 pentagons into 12 dodecahdron halves. Connect the type three modules to each other in groups of three (using the CD tabs) (see the picture). You'll have 20 of these. You'll connect three dodecahdron halves to each of these. (again, the picture will probably enlighten you more than this description). This one holds together very well -- I had the one pictured hanging in my living room (unglued) for a year before I noticed that it was turning oblong. I made another one and glued it, and it has lasted for a long time. Enjoy! Jim