"Ptolemy's theorem" meaning in English

See Ptolemy's theorem in All languages combined, or Wiktionary

Proper name

Etymology: Named after the Greek astronomer and mathematician Ptolemy. Head templates: {{en-proper noun}} Ptolemy's theorem
  1. (geometry) 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. Wikipedia link: Ptolemy's theorem Categories (topical): Geometry
    Sense id: en-Ptolemy's_theorem-en-name-9pJ3X9M4 Categories (other): English entries with incorrect language header, Pages with 1 entry, Pages with entries Topics: geometry, mathematics, sciences
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This page is a part of the kaikki.org machine-readable English dictionary. This dictionary is based on structured data extracted on 2024-12-15 from the enwiktionary dump dated 2024-12-04 using wiktextract (8a39820 and 4401a4c). The data shown on this site has been post-processed and various details (e.g., extra categories) removed, some information disambiguated, and additional data merged from other sources. See the raw data download page for the unprocessed wiktextract data.

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