## Search found 83 matches

Thu Jan 06, 2011 8:16 am
Forum: Polyhedron Models
Topic: Great ditrigonal dodecicosidodecahedron
Replies: 3
Views: 15836
What do you use to draw the shapes of the faces prior to cutting out?

Certainly the colours do look good - I've always felt that the card that I use looks a bit drab!
Thu Dec 30, 2010 6:43 pm
Forum: Stella Forum
Topic: Help with Colours
Replies: 5
Views: 11709
I'm about 40% of the way through a stellation of the "degenerate" with the great dodecahedron edge inscribed in its icosahedron shell. I'm using 16 colours - 6 easily distinguished colours for the dodecahedral faces and 10 far less identifiable colours for the icosahedral. I selected the colours in ...
Sun Aug 29, 2010 10:20 am
Forum: Stella Forum
Topic: Help with Colours
Replies: 5
Views: 11709
I bought twenty nine different colours of card, so I have enough choice for most models. Like you I'm red-green colour blind, so I have to write on each sheet of card what colour it is. I can handle 5 colours for hexecontahedra and 4 colours for icositetrahedra, but for triacontahedra I normally use...
Sat Aug 28, 2010 7:45 pm
Forum: Stella Forum
Topic: Help with Colours
Replies: 5
Views: 11709
I must admit I'd be tempted to use ten colours for the triangles and six colours for the decagrams and pentagons. Keep us posted on progress and post a picture or two when you've completed it. I've currently got my eye on a stellation of the icosahedron with chiral tetrahedral symmetry that appears ...
Sat Jun 12, 2010 6:10 pm
Forum: Stella Forum
Topic: Stella image in New York Review of Books
Replies: 8
Views: 17020
...join two cubes and "hyper-fold" along the joined face to rotate one cube into the fourth dimension. Back in the mid 60s I, as a third former, walked proudly into the sixth form mathematics room with the hypercube that I'd made from acetate sheet only to have it dismissed by a sixth former who to...
Sat May 22, 2010 6:08 am
Forum: Stella Forum
Topic: Stella image in New York Review of Books
Replies: 8
Views: 17020
My brain is obviously too ingrained with 3D! I can understand (for example) all the stages of a draw-polytope from zero through to three dimensions, but I cannot visualise how to effect the stage beyond three. You have your X, Y and Z axes. How do you go beyond these? You can convert a tessellation ...
Sat May 15, 2010 5:22 pm
Forum: Stella Forum
Topic: Stella image in New York Review of Books
Replies: 8
Views: 17020
You can view a polygon (two dimensions) as a line (one dimension) by looking at it edge on. But you cannot view it as a point (zero dimensions). You can view or draw a two dimensional image of a polyhedron (three dimensions) But you cannot view or draw it as a line (one dimension). I wonder, therefo...
Sat May 01, 2010 4:46 pm
Forum: Polyhedron Models
Topic: Double Tabs.
Replies: 6
Views: 24427
Thanks for your help. My glue isn't that good for model making, its stringy and takes around ten minutes to set. Try using Balsa Cement. It dries very quickly. What sort of paper or card are you using? Cartridge paper works OK, but I'm happier using 160 gsm card. I never use single tabbing now. Dou...
Thu Apr 22, 2010 5:18 pm
Forum: Polyhedron Models
Topic: Paper model choices. Scissors/knife? Single/double tabs? etc
Replies: 24
Views: 171865
How smooth is the ball point without the ink? I'd always assumed that the ink would act as a lubricant.

What is the polyhedron in your avatar? Have you got a larger photo of it?
Sat Apr 17, 2010 4:08 pm
Forum: Polyhedra
Topic: Isohedra with non-convex faces
Replies: 19
Views: 48646
Three pictures of a sort of Isohedron where the 5th vertex of the pentagon is on the opposing edge. It's a stellation of the regular dodecahedron. http://i112.photobucket.com/albums/n174/oxenholme/StellatedDodecahedron1.jpg http://i112.photobucket.com/albums/n174/oxenholme/StellatedDodecahedron2.jpg...
Mon Apr 05, 2010 8:29 pm
Forum: Polyhedra
Topic: Isohedra with non-convex faces
Replies: 19
Views: 48646
http://i112.photobucket.com/albums/n174/oxenholme/twocubicisohedra.jpg It is interesting (at least I think it's interesting!!!!) to compare the stellation of the pentagonal icositetrahedron on the left with the isohedron on the right. The one on the left is a sort of special case of the one on the ...
Mon Apr 05, 2010 8:23 pm
Forum: Polyhedra
Topic: Isohedra with non-convex faces
Replies: 19
Views: 48646
I finished the final Isohedron today...

The one on the left has octahedral symmetry. The one on the right has cubic symmetry
Sat Jan 02, 2010 3:10 pm
Forum: Stella Forum
Topic: star tetrahedron
Replies: 4
Views: 14236
Wouldn't that give you Stella Octangula?
Sat Dec 26, 2009 6:51 pm
Forum: Polyhedra
Topic: Do you ever make polyhedra for other people?
Replies: 7
Views: 24553

### Do you ever make polyhedra for other people?

Nicola at work had never previously encountered polyhedra. I doodled a line drawing of the small stellated dodecahedron and she was fascinated, quickly asking me to make a model for her. I find it a tad tricky to get the small stellated dodecahedron perfect, so for the time being I made a great dode...
Sat Dec 26, 2009 6:41 pm
Forum: Polyhedra
Topic: Octahedron plus Dodecahedron
Replies: 1
Views: 10977

### Octahedron plus Dodecahedron

I spotted this among the compounds in Stella and had to make it. I tried using a multicolour octahedron and a plain grey dodecahedron. It looks super in the flesh and a bit ordinary in the pictures. I have yet to get a printer, so I had to work out the net for myself... http://i112.photobucket.com/a...