reguladetri
Swedish edit
Etymology edit
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 edit
reguladetri c
- (mathematics) proportionality, cross-multiplication, the art of determining an unknown 4th value from 3 known values (a/b=c/d gives ad=bc)
Declension edit
| Declension of reguladetri | ||||
|---|---|---|---|---|
| Uncountable | ||||
| Indefinite | Definite | |||
| Nominative | reguladetri | reguladetrin | — | — |
| Genitive | reguladetris | reguladetrins | — | — |