Assertion: ellipse | /r/HasProperty | constant
Facets:
Source sentences:
text: An ellipse is the set of all points P such that the sum of the distances between P and two distinct points, called the foci (±c, 0), is a constant.
text: Ellipse is the locus of a point P which moves such that the ratio of its distance from the fixed point F to its distance from a fixed line is a constant and is always less than 1.