Assertion: ellipse | /r/DefinedAs | the locus of all points
Facets:
value: usually
type: TEMPORAL
value: in euclidean geometry
type: LOCATION
value: in the plane
type: LOCATION
Source sentences:
text: An ellipse is defined as the locus of all points in the plane for which the sum of the distances r 1 and r 2 to two fixed points F 1 and F 2 (called the foci) separated by a distance 2c, is a given constant 2a.
text: In Euclidean geometry, an ellipse is usually defined as the bounded case of a conic section, or as the locus of the points $ P $ such that the distances to two fixed points is constant.