Euclidean theorem

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

See also

• Euclidean (disambiguation)
• Euclid (disambiguation)