Talk:Circle

--><-- terminology contradicts itself and is inconsistent

Quoting:

  Diameter: a line segment ... which passes through the centre;

  Semicircle: ... it may mean the diameter, arc, and its interior, a ... region, that is technically called a half-disc.

So a half-disc contains a diameter which contains the centre.

Quoting:

  Segment: a region, not containing the centre ...

thus the following quote is contradictory:

  A half-disc is a ...  segment ...

So, is it not the case that the centre can be in a segment?

Perhaps the wording should be:

  A half-disc is a ...  sector ... 

Maybe qualifying this with the fact that this special case means that the major and minor sectors are indistinguishable when the sector's two radii are colinear and form a diameter?

(must disqualify the pathological case where the radii are also coincident as well as colinear in which case the major and minor sectors are distinct)

PS. This begs the question: What is the remainder of a circle, disc, called when a segment is removed?

— Preceding unsigned comment added by 208.124.216.34 (talk) 21:07, 19 March 2019 (UTC)

Hopefully, I took care about this. Purgy (talk) 09:14, 20 March 2019 (UTC)

Angles

The angle a circle curves at should be infinitely small because it has no sides, even though it curves and is angled. — Preceding unsigned comment added by Aether101 (talk • contribs) 16:55, 20 March 2019 (UTC)

A circle has no angle; it has a curvature. However, this is not described in the article and probably should be.—Anita5192 (talk) 17:10, 20 March 2019 (UTC)

Semi-protected edit request on 28 March 2019

119.30.38.14 (talk) 07:01, 28 March 2019 (UTC)

Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format and provide a reliable source if appropriate. – Þjarkur (talk) 10:46, 28 March 2019 (UTC)

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)