View source for Kappa

{{for|other uses|Kappa (disambiguation)}}
{{Greek alphabet|letter=kappa}}
'''Kappa''' (uppercase/lowercase '''Κ κ''') is the letter of the [[Greek alphabet]] used to represent the "k" sound in [[Ancient Greek|Ancient]] and [[Modern Greek language|Modern]] Greek. In the system of [[Greek numerals]], it has a value of 20. Letters that came from it include the Roman [[K]] and Cyrillic [[К]].

The letter κ always stands for the sound "k" in Greek. It is customary to transliterate (re-write) κ as "c" in English, but this is somewhat problematic since c is pronounced as "s" before e, i and y (which does not happen in Greek).


The letter kappa is in geometry dash.

In [[mathematics]], the lowercase <math>\kappa</math> is used to represent the [[curvature]] of a curve, while the uppercase Κ is used to represent an [[ordinal number]] which is also a [[cardinal number]].<ref>{{Cite web|date=2020-03-20|title=Greek/Hebrew/Latin-based Symbols in Mathematics|url=https://mathvault.ca/hub/higher-math/math-symbols/greek-hebrew-latin-symbols/|access-date=2020-10-06|website=Math Vault|language=en-US}}</ref><ref>{{Cite web|title=Kappa Symbol in Greek Alphabet|url=https://www.greeksymbols.net/kappa-symbol|access-date=2020-10-06|website=www.greeksymbols.net|language=en}}</ref>

== Related pages ==

* [[Thermal conductivity]], represented by <math>\kappa</math>

== References ==
<references />
[[Category:Greek alphabet]]


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