This article is about the Greek letter. For other uses, see Theta (disambiguation).
"θ" redirects here. For the letter used in IPA, see Voiceless dental fricative.
Not to be confused with Fita.
For similar symbols, see Ø (disambiguation).
Theta (uppercase Θ or ϴ, lowercase θ (which resembles digit 0 with horizontal line) or ϑ; Ancient Greek: θῆτα, thē̂ta, [tʰɛ̂ːta]; Modern: θήτα, thī́ta, [ˈθita]; UK /ˈθiːtə/, US /ˈθeɪtə/) is the eighth letter of the Greek alphabet, derived from the Phoenician letter Teth Phoenician teth.svg. In the system of Greek numerals it has a value of 9.
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