bn:00035565n
Noun Concept
Categories: Conic sections, Geometric centers
EN
focus  circular directrix  directrix circle  Focal radius  foci
EN
English:
mathematics
geometry
Definitions
Relations
Sources
EN
In geometry, focuses or foci are special points with reference to which any of a variety of curves is constructed. Wikipedia
A key point in specifying a conic section or other plane curve Wikipedia Disambiguation
Fixed reference point; special points with reference to which any of a variety of curves is constructed Wikidata
A special point used to define a conic section. OmegaWiki
DERIVATION
WordNet 3.0 & Open English WordNet
EN
Wikipedia
Wikidata
EN
OmegaWiki
EN