Changes: Annular Dodecahedron

Revision as of 11:53, 29 October 2007

A Geomag classic: pentagonal torii stitched together into a dodecahedron.

Each module has 105 center rods, and 15 edge rods. So, there are 12*105 + 30*3 = 1350 rods in total.

Each module has 40 balls: 25 center, 10 edge and 5 vertex. So there are 12*25 + 30*10 + 20*5 = 700 balls.

Build a Pentagonal Torus module: it is helpful to build an extra module out of a different color and leave it nearby, because its really easy to get lost whilst building.
Build another torus
Strip the edge of one torus to join the two together
Rest the linked modules on the hinge, and erect scaffolding poles to support the modules at the right angle.
Now, resist the temptation to proceed onwards with modules. Instead, learn how to build the diamond-shaped tube in-place on the model. Use a contrasting color for the true edges of the dodecahedron to keep yourself orientated.
Let the structure grow at first like a bowl, then like a dome. Keep the build balanced and keep evolving the model with an eye to the symmetry.

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-{{Geomag-construction|PageTitle=Annular Dodecahedron (Side 3)|Filename=Geomag Annular Dodecahedron (side 3).jpg|Caption=<small>Side 3 version</small>|Type=typetodo|Triangles=|Rods=1000|Balls=200|Author=--[[User:Karl Horton|Karl Horton]] 11:34, 29 October 2007 (UTC)}}
+{{Geomag-construction|PageTitle=Annular Dodecahedron (Side 3)|Filename=Geomag Annular Dodecahedron (side 3).jpg|Caption=<small>Side 3 version</small>|Type=[[Dodecahedron]]|Triangles=|Rods=1350|Balls=700|Author=--[[User:Karl Horton|Karl Horton]] 11:34, 29 October 2007 (UTC)}}
 A Geomag classic: pentagonal torii stitched together into a dodecahedron.
+=== Counting ===
+Each module has 105 center rods, and 15 edge rods. So, there are 12*105 + 30*3 = 1350 rods in total.
+Each module has 40 balls: 25 center, 10 edge and 5 vertex. So there are 12*25 + 30*10 + 20*5 = 700 balls.
 == Building Instructions ==