Talk:Plane (geometry)/Archive 1: Difference between revisions
imported>Boris Tsirelson (→Getting better: thanks; a lead?) |
imported>Thomas Wright Sulcer (→Getting better: r) |
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Excellent article! This ain't a plain-old article by any flat stretch.--[[User:Thomas Wright Sulcer|Thomas Wright Sulcer]] 16:07, 1 April 2010 (UTC) | Excellent article! This ain't a plain-old article by any flat stretch.--[[User:Thomas Wright Sulcer|Thomas Wright Sulcer]] 16:07, 1 April 2010 (UTC) | ||
:Thank you for the compliment to Paul and me. However, a good article must have a lead, and probably introduction, right? Maybe you can try? [[User:Boris Tsirelson|Boris Tsirelson]] 17:51, 1 April 2010 (UTC) | :Thank you for the compliment to Paul and me. However, a good article must have a lead, and probably introduction, right? Maybe you can try? [[User:Boris Tsirelson|Boris Tsirelson]] 17:51, 1 April 2010 (UTC) | ||
::Maybe in a bit. I'm off doing errands now. Thanx for your vote of confidence in me but I'm not scientific by any flat stretch!--[[User:Thomas Wright Sulcer|Thomas Wright Sulcer]] 17:55, 1 April 2010 (UTC) | |||
Revision as of 11:55, 1 April 2010
Picture
Sorry, again. But this is even more a bad idea! This picture may -- perhaps! -- be used to illustrate the topological concept of a surface, certainly not that of a plane. --Peter Schmitt 00:42, 18 March 2010 (UTC)
Remarks
"A plane is a surface on which a line perpendicular to a line which lies on that surface also falls entirely on the surface" — where is it taken from?? Hopelessly bad "definition".
"A plane is made up of an infinite number of straight lines" — it surely contains infinitely many straight lines, as well as infinitely many triangles, circles etc. But is it "made up" of them??
"Surfaces can be parallel" — really? what is the definition of this notion?
"Thus the surface has on it point A, point B, and point C is called surface ABC" — a plane is determined by three points (if not on a straight line), but a surface is not.
"If this crumpled picture of the Earth was spread flat on a perfectly flat table, and the picture had absolutely no thickness, then it would be a plane" — no, it would be a finite domain on a plane.
Boris Tsirelson 15:29, 28 March 2010 (UTC)
Rewritten
I was bold enough to rewrite it completely. Hope you do not object. Could someone please add an appropriate lead, and probably introduction with a completely informal idea of plane? It would be also nice to have pictures to the three geometric definitions. Boris Tsirelson 09:57, 29 March 2010 (UTC)
Analytic geometry
I added some high-school-level analytic geometry plus two drawings. --Paul Wormer 10:46, 1 April 2010 (UTC)
Getting better
Excellent article! This ain't a plain-old article by any flat stretch.--Thomas Wright Sulcer 16:07, 1 April 2010 (UTC)
- Thank you for the compliment to Paul and me. However, a good article must have a lead, and probably introduction, right? Maybe you can try? Boris Tsirelson 17:51, 1 April 2010 (UTC)
- Maybe in a bit. I'm off doing errands now. Thanx for your vote of confidence in me but I'm not scientific by any flat stretch!--Thomas Wright Sulcer 17:55, 1 April 2010 (UTC)