Saturday, July 28, 2012

More shapes

Isn't geometry great? After making the bead I showed (badly) in the last post, I wanted to make more. The original one, which is the 1st one in both of these pictures, was based on the cuboctahedron, which has 24 edges. So I wanted to make some shapes based on solids with a fairly similar number of edges, so they could come out similar in size. The 2nd shape in the group is based on the truncated tetrahedron, which has 18 edges. I thought about doing a dodecahedron or icosahedron, but they both have 30 edges, so would be bigger than I thought I wanted. So I went to the list of Johnson solids (Hurray for wikipedia) and found more shapes. I especially like the last 2 that are dome shaped--they're called cupolas on the list--because I'm thinking of making a bracelet with several shapes linked together, and those give a flat side to have on the inside with the "dome" facing out. One of them is basically an icosahedron with the bottom 5 triangles cut off, so it has 25 edges. The smaller one has a hexagon on the bottom and 18 edges. I posted 2 pictures of the shapes so you could see them from the top as well as the side. One thing I've been meaning to do is put together a tutorial and see if anyone's interested in learning how to make one. I might do it with one of these shapes. I don't have a graphics type program, but would do it with lots of photos.

1 comment:

  1. I'm not often a fan of beaded tetrahedrons, but this one is particularly nice.