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Θ/θ

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Also known as Θ, θ, theta

Theta (, , uppercase Θ or ϴ; lowercase θ; cursive ϑ; thē̂ta ; Modern: thī́ta ) is the eighth letter of the Greek alphabet, derived from the Phoenician letter Teth 𐤈. In the system of Greek numerals, it has a value of 9.

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Theta (Θ/θ) is the eighth letter of the Greek alphabet, originally derived from the Phoenician letter Teth. In ancient Greek numerical systems, theta represented the number 9 and remains a foundational character in Greek writing and mathematics.

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Theta (letter)
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θ
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Article

15 sections
Contents
  • Greek
  • Forms
  • Latin
  • Cyrillic
  • International Phonetic Alphabet
  • Mathematics and science
  • Lower case
  • Upper case
  • Symbolism
  • Abbreviation
  • Unicode
  • See also
  • Notes and references
  • Notes
  • References

Theta (, , uppercase Θ or ϴ; lowercase θ; cursive ϑ; thē̂ta ; Modern: thī́ta ) is the eighth letter of the Greek alphabet, derived from the Phoenician letter Teth 𐤈. In the system of Greek numerals, it has a value of 9.

==Greek== In Ancient Greek, θ originally represented the aspirated voiceless dental plosive , but it later became a voiceless dental fricative , which is the value it retains in Modern Greek.

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