reguladetri

Swedish

Etymology

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.

Noun

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)

Declension

Declension of reguladetri

		nominative	genitive
singular	indefinite	reguladetri	reguladetris
	definite	reguladetrin	reguladetrins
plural	indefinite	—	—
	definite	—	—

References

• reguladetri in Svenska Akademiens ordlista (SAOL)
• reguladetri in Svenska Akademiens ordbok (SAOB)