Assertion: parabola's point | /r/HasProperty | line
Facets:
Source sentences:
text: : A point inside the parabolic section defined by forming a right triangle with the axis of symmetry and the cone’s horizontal radius. axis of symmetry : A line that divides the parabola into two equal halves and also passes through the vertex of the parabola.
text: the pole of q. An absolute point (line) of a polarity is one which is incident with its polar (pole).
text: Using Steiner's definition of a conic (this locus of points will now be referred to as a point conic) as the meet of corresponding rays of two related pencils, it is easy to dualize and obtain the corresponding envelope consisting of the joins of corresponding points of two related ranges (points on a line) on different bases (the lines the points are on).