Search found 78 matches
- Fri Jul 26, 2013 4:54 pm
- Forum: Stella Forum
- Topic: Sacred Geometry
- Replies: 45
- Views: 192062
@3katie3. The centre of a triangle does look lopsided when seen from the side. One extremity of the triangle, say the left, will be a corner and a long way from the centre. The other extremity, say the right, will be an edge which passes much closer to the centre. When you spin the triangle about it...
- Mon Jul 22, 2013 8:13 pm
- Forum: Polyhedron Models
- Topic: How do I make this star?
- Replies: 9
- Views: 32905
- Wed Jun 05, 2013 7:53 pm
- Forum: Polyhedron Models
- Topic: Faceted Polyhedron
- Replies: 3
- Views: 18839
- Tue Apr 02, 2013 9:35 pm
- Forum: Polyhedron Models
- Topic: How do I make this little beauty, please?
- Replies: 9
- Views: 51926
One interesting opportunity here comes from the fact that the faces come in parallel sets. On each side, one face from the small stellated dodecahedron is parallel to one from its great stellated cousin. Since these figures have opposite sides, also parallel, that makes four parallel faces in all. S...
- Mon Mar 18, 2013 8:33 pm
- Forum: Polyhedron Models
- Topic: Help with MW63
- Replies: 22
- Views: 59595
Hi Peter, The backs lie in the 20 face planes of the icosahedron. These correspond to the 20 vertices of the dodecahedron, so matching them with the 12 pentagonal faces doesn't work. You could match the corners of each triangle to the 12 faces, which is of course the "same back and front" solution y...
- Fri Mar 01, 2013 10:13 pm
- Forum: Polyhedron Models
- Topic: Zonohedrified Crossed Heptagrammic Cupolaic Blend
- Replies: 4
- Views: 19081
- Mon Nov 05, 2012 10:03 pm
- Forum: Polyhedra
- Topic: Gilson: Polyhedra - A New Approach
- Replies: 20
- Views: 46217
- Thu Nov 01, 2012 9:00 pm
- Forum: Polyhedra
- Topic: Gilson: Polyhedra - A New Approach
- Replies: 20
- Views: 46217
Hi, This is not an easy figure to construct. Some dimensions are arbitrary, but there are some determined relationships too. I find the maths to be awkwardly developed. Personally, if I were working out coordinates I would use polar in the XY plane and Cartesian in the Z. And if you don't understand...
- Fri Oct 05, 2012 6:23 pm
- Forum: Polyhedra
- Topic: Gilson: Polyhedra - A New Approach
- Replies: 20
- Views: 46217
OK, I have now read Gilson's book. Sadly I can recommend it only to the most hardened polyhedron enthusiast (like me) ;) . Others will find it badly wanting. Its approach purports to be based on symmetry, and to focus on polyhedra having a single major axis of symmetry, such as a regular prism. It i...
- Thu Sep 27, 2012 7:59 pm
- Forum: Polyhedra
- Topic: Gilson: Polyhedra - A New Approach
- Replies: 20
- Views: 46217
- Tue Jul 03, 2012 7:55 pm
- Forum: Polyhedra
- Topic: Faceted snub cube
- Replies: 13
- Views: 45331
@Kathy, Yes, I can see it fine - and if my clunky box can see it, most anybody can. Lovely model! As a follow-up to my previous post, I am told that it does not have a regular "abstract" structure. In fact it is possibly the only known noble and self-dual polyhedron that is not regular in structure.
- Sat Jun 30, 2012 3:21 pm
- Forum: Polyhedra
- Topic: Faceted snub cube
- Replies: 13
- Views: 45331
Its self-duality just made me realise that its abstract form appears to be regular, so we could write it as {5 5} V-E+F = 24-60+24 = -12 so topologically it is a toroid of genus (2-(-12))/2 = 7 (where V = number of vertices, E = number of edges, F = number of faces). I wonder if this regular abstrac...
- Wed May 02, 2012 6:33 pm
- Forum: Polyhedron Models
- Topic: Construction de mes polyèdres en bois
- Replies: 7
- Views: 28458
- Sat Dec 10, 2011 9:44 pm
- Forum: Polyhedron Models
- Topic: Can you see what this is ?
- Replies: 3
- Views: 16045
- Thu Oct 13, 2011 9:12 pm
- Forum: Polyhedron Models
- Topic: Wood Polyhedrons
- Replies: 3
- Views: 17780