Talk:Disdyakis triacontahedron

From Wikipedia, the free encyclopedia
WikiProject Mathematics (Rated Start-class, Low-importance)
WikiProject Mathematics
This article is within the scope of WikiProject Mathematics, a collaborative effort to improve the coverage of Mathematics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Mathematics rating:
Start Class
Low Importance
 Field:  Geometry

Remove calculation comment: Tom Ruen 08:40, 29 July 2006 (UTC)

  • Side lengths for r=12:

s1=4.35411996 s2=6.55839670 s3=7.69022184 (Calculated by Garrith McLean)

Hexakis icosahedron?

Why's it also called a hexakis icosahedron? Professor M. Fiendish, Esq. 02:53, 2 September 2009 (UTC)
That's what Williams calls it, I guess each triangular face of the icosahedron is divided into 6 faces. Tom Ruen (talk) 03:03, 2 September 2009 (UTC)
Holden (Shapes, space, and symmetry, 1971) calls it that too. [1] Tom Ruen (talk) 03:08, 2 September 2009 (UTC)

Sides?

Something is wrong with the edges. In the pictures, you clearly see that the sides are right-angled. In the infobox however; It says that the edges are 4, 6 and 10. Whith the pythagorean theorem we see:

That means that it is not 4, 6, 10. Does anyone know what it is? --Berntisso (talk) 19:39, 7 September 2011 (UTC)

First, they are not right-angled. They are only right-angled if you project them at a right angle. Secondly, the face configuration (4,6,10) is not referring to edge lengths; they are referring to how many faces surround each type of vertex.—Tetracube (talk) 20:09, 7 September 2011 (UTC)
Hmmm... the faces have right angles only as a spherical tiling with spherical triangle faces. There you can extract the angles from the V4.6.10 notation; internal angles are 360/4, 360/6, 360/10 or 90,60,36. The polyhedral face angles are a bit smaller - specifically 88d58'31", 58d14'17",32d46'12" (adding to 180 degrees) by Robert Williams. SockPuppetForTomruen (talk) 22:01, 7 September 2011 (UTC)
So, which are the proportions of the lenghts of the triangle? If the ratio is irrational, is there a good integer approximation? --RokerHRO (talk) 15:41, 10 February 2015 (UTC)

Twisty puzzles

Whether this figure can be a puzzle mechanism is currently the biggest unsolved problem in the area of mechanical puzzles. In the realm of twisty puzzles, it's known as "big chop". EdPeggJr (talk) 18:44, 24 August 2015 (UTC)

I moved the statement into a new Uses section. It would be good to get more sources for the claims. Tom Ruen (talk) 19:54, 24 August 2015 (UTC)
The outer shape for a twisty puzzle is very flexible. If a good mechanism was found, many variations of this would be made. It's not particularly the dodecahedral shape that's wanted, it's the big chop mechanism. I'd want the sphere version myself. But currently it's an unsolved problem. Tens of thousands of twisty puzzle mechanisms have been developed, but this unsolved one is the biggie. 98.212.151.160 (talk) 01:46, 25 August 2015 (UTC)

External links modified

Hello fellow Wikipedians,

I have just modified one external link on Disdyakis triacontahedron. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

  • Added archive https://web.archive.org/web/20080804081355/http://polyhedra.org:80/poly/show/43/hexakis_icosahedron to http://polyhedra.org/poly/show/43/hexakis_icosahedron

When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at {{Sourcecheck}}).

You may set the |checked=, on this template, to true or failed to let other editors know you reviewed the change. If you find any errors, please use the tools below to fix them or call an editor by setting |needhelp= to your help request.

  • If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
  • If you found an error with any archives or the URLs themselves, you can fix them with this tool.

If you are unable to use these tools, you may set |needhelp=<your help request> on this template to request help from an experienced user. Please include details about your problem, to help other editors.

Cheers.—InternetArchiveBot (Report bug) 21:55, 13 December 2016 (UTC)

External links modified

Hello fellow Wikipedians,

I have just modified 2 external links on Disdyakis triacontahedron. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

  • Added archive https://web.archive.org/web/20100919143320/https://akpeters.com/product.asp?ProdCode=2205 to http://www.akpeters.com/product.asp?ProdCode=2205
  • Corrected formatting/usage for http://polyhedra.org/poly/show/43/hexakis_icosahedron

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

You may set the |checked=, on this template, to true or failed to let other editors know you reviewed the change. If you find any errors, please use the tools below to fix them or call an editor by setting |needhelp= to your help request.

  • If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
  • If you found an error with any archives or the URLs themselves, you can fix them with this tool.

If you are unable to use these tools, you may set |needhelp=<your help request> on this template to request help from an experienced user. Please include details about your problem, to help other editors.

Cheers.—InternetArchiveBot (Report bug) 09:21, 11 September 2017 (UTC)

Retrieved from "https://en.wikipedia.org/w/index.php?title=Talk:Disdyakis_triacontahedron&oldid=800062225"
This content was retrieved from Wikipedia : http://en.wikipedia.org/wiki/Talk:Disdyakis_triacontahedron
This page is based on the copyrighted Wikipedia article "Talk:Disdyakis triacontahedron"; it is used under the Creative Commons Attribution-ShareAlike 3.0 Unported License (CC-BY-SA). You may redistribute it, verbatim or modified, providing that you comply with the terms of the CC-BY-SA