Talk:Girih tiles

message: Can't find a reliable source for the English pronunciation of the word "girih." ar.wikipedia has it as جيرة (?) but this initial jim could be realised as  or  (possibly also  but I'm not sure) depending on the dialect. Greg Ravn (talk) 03:18, 23 October 2009 (UTC)
replies: text: Egyptian Arabic would use a "g" sound for the Arabic letter ج, while most other dialects would use "j" (i.e. "dzh") or "zh" sounds.  The "j" sound would usually be considered the most standard modern literary Arabic pronunciation, but if the word is most commonly spelled Girih in English, that's the spelling which should be used on Wikipedia... AnonMoos (talk) 15:29, 17 November 2009 (UTC)
replies: text: This is a Persian word, not Arabic. In fact this is a famous art in Iran/Persian World (known as گره چینی Girih-chīnī / Gereh-chini) but not known much in Arab world AFAIK. The Arabicized form used in Arabic Wikipedia (:ar:جيرة) is also wrong, it should be  or . --Z 07:48, 27 March 2012 (UTC)
thread_title: Pronunciation

message: Could we get some better images? I appreciate the examples given and the way they demonstrate what's going on mathematically with these tiles, but it would be quite educational to actually see them in real-world use, or even better computer renders that aren't colour-coded. I'm not up to snuff on acquiring images that don't violate any copyright restrictions. Interestingly, ar.wikipedia uses girih tiles as their background! Greg Ravn (talk) 03:18, 23 October 2009 (UTC)
replies: text: If you follow the external links in the references, you will find better images. However they are copyrighted, so legally we cannot just put them into this article. Sorry. JRSpriggs (talk) 15:11, 24 October 2009 (UTC)
thread_title: Examples

message: I don't know if Wikipedia has a house policy on the usage of degrees or radians; personally I think it would be made easier to understand it if we used radians, but I'm also aware that degrees are more widely accepted. If I was sure it was okay I'd have done it myself, but since I can neither confirm nor deny a general rule I thought it would be worth discussing first. Greg Ravn (talk) 03:18, 23 October 2009 (UTC)
replies: text: As the article says "... all their angles are multiples of 36° (π/5).". Just divide the angles in degrees by 36 and you will get the number to multiply by (π/5) radians. JRSpriggs (talk) 15:15, 24 October 2009 (UTC)
thread_title: Radians vs degrees

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thread_title:  External links modified 

message: This article, as its name says, is the tiles that are used for Girih. Other articles look at the patterns formed by girih. Chiswick Chap (talk) 14:51, 16 November 2018 (UTC)
thread_title: Topic of this article

message: In this edit I've moved the Persian names of each tile into the bulleted list. However, there were two inconsistencies before, and I have not consulted the source, so I may have made it worse:
* Shesh Band was described as concave hexagonal, but as Sormeh Dan was described as bow tie, Shesh Band must be the convex hexagram (unless it's the other way round!)
* Tabl was described as decagram, which actually means a 10-pointed star (a concave icosagon); Tabl must in fact be the decagon.
Both inconsistencies may have to do with a confusion between the outlines of the tiles (black in figure; a.k.a. construction lines), and the interior lines (blue; girih pattern): The pattern on the decagon is a decagram, and the pattern on the convex hexagram is bowtie-like. So, perhaps tabl really does refer to a decagram. If so, I think the whole section should be rewritten to make the distinction between pattern and outline clear. My preference would be to present the information in a table, rather than a bullleted list, with columns like
 The five tiles
Shape of tile outline                           	Shape of tile pattern     	Persian name of pattern
regular decagon with ten interior angles of 144°	decagram (10-pointed star)	Tabl
etc. But I think the contribution of an expert (or someone with access to the source) is required.
:Sign above post, and edit text slightly to clarify.--Nø (talk) 10:44, 23 January 2023 (UTC)
thread_title:  Persian names of tiles 

message: The article says:
:However, the decagon has two possible girih patterns one of which has only fivefold rather than tenfold rotational symmetry.
No source, I think, and no indication what the other pattern looks like. ?? Nø (talk) 08:52, 3 February 2023 (UTC)
thread_title:  Two decagon patterns?