Talk:Circle

Ring

please change ((ring)) to ring

 Not done: I'm not seeing what it is you want changed. Highway 89 (talk) 15:17, 3 August 2019 (UTC)

 Done In the last sentence of the article the term "ring" was improperly linked to a disambiguation page and this may be the issue of concern. I revised the entire sentence and this issue has disappeared. --Bill Cherowitzo (talk) 18:48, 3 August 2019 (UTC)

Why not 600°?

Why not 600°? Bhavyar19 (talk) 05:39, 11 April 2020 (UTC)

@Bhavyar19:Your question would be more appropriate at Talk:Degree (angle), but read Degree (angle) first.—Anita5192 (talk) 06:45, 11 April 2020 (UTC)

@Bhavyar19 and Anita5192: the question would not be appropriate on any article talk page. On article talk pages we can only discuss the article, not the subject—see wp:Talk page guidelines. The only place to (perhaps) go with this, if at all, is the wp:Reference desk/Science. Cheers. - DVdm (talk) 09:32, 11 April 2020 (UTC)

Compute Circle from 3 points

I recently had to figure out the details of a circle given 3 points, and I was unable to find what I was looking for on Wikipedia. Would there be a section here I could add some information to, or perhaps a better page somewhere? I have a neat browser demo: https://eyeofmidas.github.io/three-point-circle/index.html Midas7g ^talk 14:24, 16 December 2020 (UTC)

The circle from east to west

For the "Significance in art and symbolism" section, Jean-François Charnier is cited as the author of the article "The circle from east to west". Mr. Jean-François Charnier is the editor of the Book "The Louvre Abu Dhabi: A World Vision of Art, October 29, 2019" and not the writer of that article.

the author of the article is: Dr. Yahya Abdullahi. — Preceding unsigned comment added by Yahyaabdullahi (talk • contribs) 19:48, 1 April 2021 (UTC)

Fixed that, new citation is

Abdullahi, Yahya (October 29, 2019). "The Circle from East to West". In Charnier, Jean-François (ed.). The Louvre Abu Dhabi: A World Vision of Art. Rizzoli International Publications, Incorporated. ISBN 9782370741004.

Hope that's OK.--Salix alba (talk): 19:11, 1 April 2021 (UTC)

Semi-protected edit request on 18 August 2021

Circle word origin is more likely from the sanskrit or indian language - chakra or chakram. Source can be found in the wikipedia page on chakram. Thelotuseaters (talk) 06:31, 18 August 2021 (UTC)

 Not done: please provide reliable sources that support the change you want to be made. ––𝗙𝗼𝗿𝗺𝗮𝗹𝗗𝘂𝗱𝗲 talk 06:34, 18 August 2021 (UTC)

"🔴" listed at Redirects for discussion

An editor has identified a potential problem with the redirect 🔴 and has thus listed it for discussion. This discussion will occur at Wikipedia:Redirects for discussion/Log/2022 February 11#🔴 until a consensus is reached, and readers of this page are welcome to contribute to the discussion. theleekycauldron (talk • contribs) (she/they) 04:21, 11 February 2022 (UTC)

The distance between any point of the circle and the centre is called the radius.

I see this lead sentence dubious because circle is probably of two elements: round (kružnica) and surface (both define circle at same time). It contains infinite number of points. Radius would be distance from circle's round to center. --5.43.73.144 (talk) 20:12, 29 June 2022 (UTC)

In English circle usually means the perimeter arc, what you call the "round"; not the interior, which is a disc or ball (commonly in informal contexts, but always in mathematics). They each have the same infinite number of points, by the way. —Tamfang (talk) 01:30, 21 May 2023 (UTC)

A circle is a special case of a torus?

Maybe it should be said in the article that a circle is a special case of a torus. !ZanzibarWikiwoowiiBarfuttress (talk) 04:44, 1 May 2023 (UTC)

In geometry, a circle may be considered a degenerate torus; but in topology they are firmly distinct. —Tamfang (talk) 00:38, 21 May 2023 (UTC)

Bad alternative definition

The second sentence of this article currently says:

Equivalently, it is the curve traced out by a point that moves in a plane so that its distance from a given point is constant.

This doesn't really work as a definition of a circle. A point can move in a plane in such a way that its distance from a given point remains constant, but not trace out a circle: it might just trace out a circular arc.

This sentence has no cited source. There might be a way to rework this sentence to make it correct, but I'm inclined to just delete it. Thoughts? —Bkell (talk) 01:43, 4 May 2023 (UTC)

It looks like it was introduced in Special:Diff/460034425, revising earlier text that was introduced in Special:Diff/459981433. That wasn't cited either, but it's clearer what the original intent was. Apocheir (talk) 20:39, 4 May 2023 (UTC)

You are correct,the correct definition is :- A circle is a set of all points that are equidistant from a point called centre Yuthfghds (talk) 06:10, 30 May 2023 (UTC)

Personally I have never been keen on the "locus of a moving point" approach to definition of a curve, as opposed to the "set of points" version, but since the locus definition is well established, I initially reluctantly left it in. However, reading the above discussion, indicating that I'm not the only one who doesn't like it, has led me to remove it. I agree with Apocheir that if we are to have the definition in the article the original version was much better, and I won't object if someone decides to restore it, but my preference is to go along with Bkell's "just delete it". Yuthfghds's text is merely a rephrasing of the other definition already in the article, and there's no point in having it in twice. JBW (talk) 14:06, 1 June 2023 (UTC)

@JBW Thank you for your feedback.I think you are correct but locus of a moving point definition is very rough.And set of points is much more defined in mathematics.Like a parabola is defined as:- Parabola is a set of all points that are equidistant from a line and a point here line is called directrix and point is called focus.You see circle comes under conics and in this way the set of points fits in. Yuthfghds (talk) 14:30, 1 June 2023 (UTC)

I think we should use set of points idea in the definition of the circle. Yuthfghds (talk) 14:40, 1 June 2023 (UTC)

A Circle have infinite sides

A Circle have infinite sides.Adding this topic expand our perspective. Yuthfghds (talk) 05:34, 2 July 2023 (UTC)

Usually a circle is taken to be a single smooth curve, that is with one curved "side" if you like. However, it is also true that a circle can also be taken as a limiting case of a regular polygon as the number of sides increases without bound. Perhaps this would be worth mentioning in Circle § Limiting case of other figures. –jacobolus (t) 07:04, 2 July 2023 (UTC)

"Meta" sentence in first paragraph

In the first paragraph of this article, it states: "This article is about circles in Euclidean geometry, and, in particular, the Euclidean plane, except where otherwise noted."

It feels really weird to include a meta statement about the article in the article. Disclaimers like this would typically go in the small area below the title of the page. I'm not incredibly familiar with mathematics related pages on Wikipedia, and if this is a common thing, then my bad. It just seems odd is all I'm saying. SpaiceyWarrior (talk) 00:58, 15 September 2023 (UTC)