reguladetri

SwedishEdit

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EtymologyEdit

From Latin regula ‎(rule), de ‎(of), tribus ‎(three), cognate with German Regeldetri, used in Swedish since 1584. The term was used in Swedish school curriculums until the 1960s.

NounEdit

reguladetri c

  1. (mathematics) proportionality, cross-multiplication, the art of determining an unknown 4th value from 3 known values (a/b=c/d gives ad=bc)

DeclensionEdit

ReferencesEdit

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