Assertion: ellipse's point | /r/HasProperty | pf
Facets:
Source sentences:
text: Eccentricity e is is defined as the ratio between the distance from a focus to the arbitrary point (PF 2 ) and the perpendicular distance to the arbitrary point from the directrix (PD).
text: Eccentricity e is defined as the ratio between the distance from a focus to the arbitrary point ( PF 2 ) and the perpendicular distance to the arbitrary point from the directrix (PD).