Kreiszahl

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German

German Wikipedia has an article on:
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Etymology

Kreis (“circle”) +‎ Zahl (“number”)

Pronunciation

  • IPA(key): /ˈkraɪ̯sˌtsaːl/
  • Audio:(file)
  • Hyphenation: Kreis‧zahl

Noun

Kreiszahl f (genitive Kreiszahl, no plural)

  1. (mathematics) the number π (an irrational constant representing the ratio of a circle's circumference to its diameter in Euclidean geometry; approximately 3.14159...)
    Synonyms: π, Pi, Archimedes-Konstante, Kreiskonstante, ludolfsche Zahl, Ludolfzahl

Declension

Declension of Kreiszahl
singular
indef. def. noun
nominative eine die Kreiszahl
genitive einer der Kreiszahl
dative einer der Kreiszahl
accusative eine die Kreiszahl

Further reading

  • “Kreiszahl” in Digitales Wörterbuch der deutschen Sprache
  • “Kreiszahl” in Uni Leipzig: Wortschatz-Lexikon
  • “Kreiszahl” in Duden online
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