Talk:Circle

message: 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)
thread_title:  "🔴" listed at [[Wikipedia:Redirects for discussion|Redirects for discussion]] 

message: I see this lead sentence dubious because circle is probably of two elements: round () 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)
replies: text: 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)
thread_title: The distance between any point of the circle and the centre is called the radius.

message: 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)
replies: text: 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)
thread_title:  A circle is a special case of a torus? 

message: The second sentence of this article currently says:
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)
replies: text: 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)

text: 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)
replies: text:  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  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 's "just delete it". '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)
replies: text: @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)
replies: text: I think we should use set of points idea in the definition of the circle. Yuthfghds (talk) 14:40, 1 June 2023 (UTC)
thread_title:  Bad alternative definition 

message: A Circle have infinite sides.Adding this topic expand our perspective. Yuthfghds (talk) 05:34, 2 July 2023 (UTC)
replies: text: 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 . –jacobolus (t) 07:04, 2 July 2023 (UTC)

text: A circle is usually taken to be a single smooth curve. The word "side" is not really precisely defined in the context of smooth curves, so you'll have to define it before you can decide how many sides a circle has. If you consider "side" to mean a straight portion of a curve, then a circle has no "sides". If you consider a "side" to be a smooth (unkinked) portion of a curve, then a circle has one "side". If you consider a "side" to be a straight line tangent to a curve, then a circle has infinite "sides". Alternately, if you like you can consider the circle to be the limiting case of a regular polygon of fixed apothem as the number of sides increases without bound ("infinite sides"). –jacobolus (t) 19:58, 27 November 2023 (UTC)
replies: text: lol 12.171.25.60 (talk) 16:29, 6 December 2023 (UTC)
thread_title:  A Circle have infinite sides 

message: Would it not be better to move discussion of regions (e.g. segment, sector) to the article on discs? 41.133.90.18 (talk) 15:14, 1 December 2023 (UTC)
thread_title:  Regions in a circle?