Assertion: parabola's line | /r/HasProperty | the focus
Facets:
Source sentences:
text: A parabola (plural "parabolas"; Gray 1997, p. 45) is the set of all points in the plane equidistant from a given line (the conic section directrix) and a given point not on the line (the focus).
text: If you take a straight line, which is called the directrix, and some point not on the line, which is called the focus, then a parabola is the locus of the points that are equidistant from the focus and the directrix.
text: A parabola is the locus of all points in a plane that are equidistant from a given line, known as the directrix, and a given point not on the line, known as the focus (see Figure 1).
text: A parabola (plural "parabolas"; Gray 1997, p. 45) is the set of all points in the plane equidistant from a given line (the conic section directrix) and a given point not on the line (the focus).
text: A parabola is the set of all points in the plane equidistant from a given line (the conic section directories) and a given point not on the line (the focus).
text: F not on the line (the focus).