Euclidean theorem
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Euclidean theorem may refer to:
- Any theorem in Euclidean geometry
- Any theorem in Euclid's Elements, and in particular:
- Euclid's theorem that there are infinitely many prime numbers
- Euclid's lemma, also called Euclid's first theorem, on the prime factors of products
- The Euclid–Euler theorem characterizing the even perfect numbers
- Geometric mean theorem about right triangle altitude