http://origami.oschene.com/archives/2005/08/07/cafe-kinko/ A Folder's Intermittent Weblog Fri, 30 Jul 2010 00:29:21 +0000 hourly 1 http://wordpress.org/?v=3.0.1 http://origami.oschene.com/archives/2005/08/07/cafe-kinko/comment-page-1/#comment-1079 KJ Rose Tue, 13 Feb 2007 16:25:56 +0000 http://origami.oschene.com/2005/08/07/cafe-kinko/#comment-1079 This looks exactly like a star I made for a Christmas tree once. Many years ago I saw a talk by the late mathematician H.S.M. Coxeter, and he talked about a rigid structure of four interlocking equilateral triangles. I then constructed them out of fuse beads (it was tricky melting them together in three dimensions) and out of tongue depressors. Several years later I found Thomas Hull"s website and his instructions for the five intersecting tetrahedra, and I used the instructions he had there for Francis Ow's 60 degree unit to make the triangles (mine are planar). This looks exactly like a star I made for a Christmas tree once. Many years ago I saw a talk by the late mathematician H.S.M. Coxeter, and he talked about a rigid structure of four interlocking equilateral triangles. I then constructed them out of fuse beads (it was tricky melting them together in three dimensions) and out of tongue depressors. Several years later I found Thomas Hull”s website and his instructions for the five intersecting tetrahedra, and I used the instructions he had there for Francis Ow’s 60 degree unit to make the triangles (mine are planar).

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