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Theta
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<p>Theta uppercase Θ or ϴ; lowercase θ or ϑ; <a href="/facts/Ancient_Greek_language/LIK7NlUh">Ancient Greek</a>: θῆτα <i>thē̂ta</i> [tʰɛ̂ːta]; <a href="/facts/Modern_Greek/nFsDHrfR">Modern</a>: θήτα <i>thī́ta</i> [ˈθita]) is the eighth letter of the <a href="/facts/Greek_alphabet/1cHwB8Dg">Greek alphabet</a>, derived from the <a href="/facts/Phoenician_alphabet/Vr4smuYg">Phoenician letter</a> <a href="/facts/Teth/l9eCffx5">Teth</a> 𐤈. In the system of <a href="/facts/Greek_numerals/vTLzPG0W">Greek numerals</a>, it has a value of 9. </p>