Word.ws English Dictionary

Ptolemy's theorem

Ptolemy's theorem proper noun: a theorem that states in a cyclic quadrilateral, the product of the lengths of its diagonals is equal to the sum of the products of the lengths of the two pairs of opposite sides.

Proper noun

Ptolemy's theorem

  1. A theorem that states in a cyclic quadrilateral, the product of the lengths of its diagonals is equal to the sum of the products of the lengths of the two pairs of opposite sides.

Origin of Ptolemy's theorem

Named after the Greek astronomer and mathematician Ptolemy.

Questions about Ptolemy's theorem

What does Ptolemy's theorem mean?
Ptolemy's theorem means a theorem that states in a cyclic quadrilateral, the product of the lengths of its diagonals is equal to the sum of the products of the lengths of the two pairs of opposite sides.
What part of speech is Ptolemy's theorem?
Ptolemy's theorem is a proper noun.

Words near Ptolemy's theorem in the dictionary

  1. Ptolemaists
  2. Ptolemean
  3. Ptolemian
  4. Ptolemies
  5. Ptolemy
  6. Ptolemy's theorem
  7. Ptolemæus
  8. ptomain
  9. ptomaine
  10. ptomaines
  11. ptomains

Source and license

Adapted from Wiktionary: Ptolemy's theorem (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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