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{{Infobox number
This is a preview for the new '''MathML rendering mode''' (with SVG fallback), which is availble in production for registered users.
| number = 90
| divisor = 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
| lang1 = [[Hebrew numerals|Hebrew]]
| lang1 symbol = <span style="font-size:150%;">צ</span> (Tzadi)
}}
'''90''' ('''ninety''') is the [[natural number]] preceded by [[89 (number)|89]] and followed by [[91 (number)|91]].


{{Wiktionary|ninety}}
If you would like use the '''MathML''' rendering mode, you need a wikipedia user account that can be registered here [[https://en.wikipedia.org/wiki/Special:UserLogin/signup]]
* Only registered users will be able to execute this rendering mode.
* Note: you need not enter a email address (nor any other private information). Please do not use a password that you use elsewhere.


[[Image:I-90.svg|100px|thumb|[[Interstate 90]] is a freeway that runs from [[Washington (state)|Washington]] to [[Massachusetts]].]]
Registered users will be able to choose between the following three rendering modes:  


== In mathematics ==
'''MathML'''
*Because 90 is the sum of its [[unitary divisor]]s (excluding itself), it is a [[unitary perfect number]], and because it is equal to the sum of a subset of its divisors, it is a [[semiperfect number]].  90 is a [[pronic number]].  But it is also a [[nontotient]].  It is a [[Perrin number]], preceded in the sequence by 39, 51, 68.
:<math forcemathmode="mathml">E=mc^2</math>
*In normal space, the interior angles of a square measure 90 degrees each. Also, in a right triangle, the angle opposing the hypotenuse measures 90 degrees, with the other two angles adding up to 90 for a total of [[180 (number)|180]] degrees.<ref>[http://www.sparknotes.com/testprep/books/newsat/chapter20section4.rhtml http://www.sparknotes.com/testprep/books/newsat/chapter20section4.rhtml]</ref> Thus, an angle measuring 90 degrees is called a right angle.<ref>Friedman, Erich. [http://www.stetson.edu/~efriedma/numbers.html What's Special About This Number?]</ref>
*90 is divisible by the sum of its base 10 digits, thus it is a [[Harshad number]].


== In science ==
<!--'''PNG'''  (currently default in production)
:<math forcemathmode="png">E=mc^2</math>


*Ninety is the atomic number of [[thorium]], an [[actinide]]. As an atomic weight, 90 identifies an [[isotope]] of [[strontium]], a by-product of nuclear reactions including fallout. It contaminates [[milk]].
'''source'''
*The latitude of the [[North Pole]] and the [[South Pole]] are 90 degrees.
:<math forcemathmode="source">E=mc^2</math> -->


==In sports==
<span style="color: red">Follow this [https://en.wikipedia.org/wiki/Special:Preferences#mw-prefsection-rendering link] to change your Math rendering settings.</span> You can also add a [https://en.wikipedia.org/wiki/Special:Preferences#mw-prefsection-rendering-skin Custom CSS] to force the MathML/SVG rendering or select different font families. See [https://www.mediawiki.org/wiki/Extension:Math#CSS_for_the_MathML_with_SVG_fallback_mode these examples].
* [[Nike Total 90]] Apparel is a brand name of football apparel and football equipment from equipment bags to [[goalkeeper gloves]]
* [[Major League baseball]] [[base (baseball)|base]]s are {{convert|90|ft}} away in distance
* The car number most associated with former [[NASCAR]] team owner [[Junie Donlavey]]
* The number of minutes in a [[football (soccer)]] match.
* NFL: [[New York Jets]] [[Dennis Byrd]]'s #90 is retired


{{Portal|Mathematics}}
==Demos==


==References==
Here are some [https://commons.wikimedia.org/w/index.php?title=Special:ListFiles/Frederic.wang demos]:
<references />
{{Integers|zero}}


[[Category:Integers]]
 
* accessibility:
** Safari + VoiceOver: [https://commons.wikimedia.org/wiki/File:VoiceOver-Mac-Safari.ogv video only], [[File:Voiceover-mathml-example-1.wav|thumb|Voiceover-mathml-example-1]], [[File:Voiceover-mathml-example-2.wav|thumb|Voiceover-mathml-example-2]], [[File:Voiceover-mathml-example-3.wav|thumb|Voiceover-mathml-example-3]], [[File:Voiceover-mathml-example-4.wav|thumb|Voiceover-mathml-example-4]], [[File:Voiceover-mathml-example-5.wav|thumb|Voiceover-mathml-example-5]], [[File:Voiceover-mathml-example-6.wav|thumb|Voiceover-mathml-example-6]], [[File:Voiceover-mathml-example-7.wav|thumb|Voiceover-mathml-example-7]]
** [https://commons.wikimedia.org/wiki/File:MathPlayer-Audio-Windows7-InternetExplorer.ogg Internet Explorer + MathPlayer (audio)]
** [https://commons.wikimedia.org/wiki/File:MathPlayer-SynchronizedHighlighting-WIndows7-InternetExplorer.png Internet Explorer + MathPlayer (synchronized highlighting)]
** [https://commons.wikimedia.org/wiki/File:MathPlayer-Braille-Windows7-InternetExplorer.png Internet Explorer + MathPlayer (braille)]
** NVDA+MathPlayer: [[File:Nvda-mathml-example-1.wav|thumb|Nvda-mathml-example-1]], [[File:Nvda-mathml-example-2.wav|thumb|Nvda-mathml-example-2]], [[File:Nvda-mathml-example-3.wav|thumb|Nvda-mathml-example-3]], [[File:Nvda-mathml-example-4.wav|thumb|Nvda-mathml-example-4]], [[File:Nvda-mathml-example-5.wav|thumb|Nvda-mathml-example-5]], [[File:Nvda-mathml-example-6.wav|thumb|Nvda-mathml-example-6]], [[File:Nvda-mathml-example-7.wav|thumb|Nvda-mathml-example-7]].
** Orca: There is ongoing work, but no support at all at the moment [[File:Orca-mathml-example-1.wav|thumb|Orca-mathml-example-1]], [[File:Orca-mathml-example-2.wav|thumb|Orca-mathml-example-2]], [[File:Orca-mathml-example-3.wav|thumb|Orca-mathml-example-3]], [[File:Orca-mathml-example-4.wav|thumb|Orca-mathml-example-4]], [[File:Orca-mathml-example-5.wav|thumb|Orca-mathml-example-5]], [[File:Orca-mathml-example-6.wav|thumb|Orca-mathml-example-6]], [[File:Orca-mathml-example-7.wav|thumb|Orca-mathml-example-7]].
** From our testing, ChromeVox and JAWS are not able to read the formulas generated by the MathML mode.
 
==Test pages ==
 
To test the '''MathML''', '''PNG''', and '''source''' rendering modes, please go to one of the following test pages:
*[[Displaystyle]]
*[[MathAxisAlignment]]
*[[Styling]]
*[[Linebreaking]]
*[[Unique Ids]]
*[[Help:Formula]]
 
*[[Inputtypes|Inputtypes (private Wikis only)]]
*[[Url2Image|Url2Image (private Wikis only)]]
==Bug reporting==
If you find any bugs, please report them at [https://bugzilla.wikimedia.org/enter_bug.cgi?product=MediaWiki%20extensions&component=Math&version=master&short_desc=Math-preview%20rendering%20problem Bugzilla], or write an email to math_bugs (at) ckurs (dot) de .

Latest revision as of 23:52, 15 September 2019

This is a preview for the new MathML rendering mode (with SVG fallback), which is availble in production for registered users.

If you would like use the MathML rendering mode, you need a wikipedia user account that can be registered here [[1]]

  • Only registered users will be able to execute this rendering mode.
  • Note: you need not enter a email address (nor any other private information). Please do not use a password that you use elsewhere.

Registered users will be able to choose between the following three rendering modes:

MathML


Follow this link to change your Math rendering settings. You can also add a Custom CSS to force the MathML/SVG rendering or select different font families. See these examples.

Demos

Here are some demos:


Test pages

To test the MathML, PNG, and source rendering modes, please go to one of the following test pages:

Bug reporting

If you find any bugs, please report them at Bugzilla, or write an email to math_bugs (at) ckurs (dot) de .

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