Talk:Thales' theorem
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Surely it should be Thales's theroem or Thales Theorem...? Jmccann: I agree.
Jmccann: I know the Greek letters don't look good, I'll spiff it up if someone else doesn't get to it first.
- I quote: Form the possessive singular of nouns with 's. But, later, Exceptions are the possessives of ancient proper names in -es and -is.
Jmccann: As a James, I am always bugged when someone refers to my stuff as James' (as if James is the plural of Jame). I left it as is because there seem to be several links to it. Basically, I am not excited enough to get worked up about it. My vote is for Thales's theorem. I had never heard of an exception for ancient proper names before this.
- I think "Thales' Theorem" is correct. The spelling, not the theorem. Although that looks pretty correct, too. -- ESP 17:26 14 Jul 2003 (UTC)
- When it comes to theorems of Greeks whose names end with an -s, there are usually three varations: Thales' theorem, Thales's theorem, and Theorem of Thales. All three are generally seen as acceptable. Other examples: Menelaus, Pappus of Alexandria. --Tokek 12:05, 27 Feb 2005 (UTC)
Quote "Since the sum of the angles of a triangle is equal to two right angles, we have
2γ + γ ′ = 180°"
How would 2y + y be equal to two right angles? Dilbert 01:12, 2 April 2006 (UTC)
Thank You! This is very helpful. 72.197.201.129 01:13, 16 May 2006 (UTC)
[edit] Thales' other theorem
Many of the interwiki links describe a different theorem, also attributed to Thales, proving that parallel lines intersecting a pair of intersecting lines create similar triangles. (See fr:Théorème de Thalès for probably the best explanation). What is this theorem called in English, and is there an article here about it? (There should be.) Rigadoun 20:49, 2 August 2006 (UTC)
The french page is very good !
