Talk:Perpendicular/Archive 1

Strange results with imaginary numbers
I moved the following here. It needs more explanation if it is to go back on the article page, please. --345Kai 08:34, 19 April 2006 (UTC)


 * This fact can also lead to strange (but correct) results with imaginary lines: e.g. the line y = ix is perpendicular with a line with &omega; = i, we see now that the line y = ix is perpendicular with itself! This seems odd but is nevertheless correct: imaginary lines can be seen as cubes in a 4-dimensional space.


 * If this is because i*i = -1, then it can be explained without involving &omega;. I'm ignorant of the geometric explanation though. Pomte 16:06, 5 December 2006 (UTC)

UNICODE symbol
Is there supposed to be a UNICODE symbol for this??

U+221F (right angle) and U+22A5 (up tack) are the closest I can find ...but parallel to (U+2225) exists!

—DIV 128.250.80.15 (talk) 03:40, 23 July 2008 (UTC)

⊥ Symbol also used in logic and Haskell programming language
The ⊥ symbol, which redirects here, is also used in logic(meaning contradiction, see Table of logic symbols) and in the Haskell programming language documentation(meaning an unresolvable value). I actually only just discovered these uses, and I'm a wikipedia noob, so I don't feel confident enough to add any explanation to this page. If anyone else does, please do so. --219.121.95.124 (talk) 13:08, 22 April 2009 (UTC)

Geometric Dimensioning and Tolerancing
This article needs to reference the use of "perpendicularity" in Geometric Dimensioning and Tolerancing.

F3meyer (talk) 16:37, 13 June 2011 (UTC)