File:Theta_uc_lc.svg · Wikimedia Commons · See Wikimedia Commons
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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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Article · 中文
Theta（大寫Θ，小寫θ，中文音译：西塔），是第八個希臘字母。
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