Assertion: parabola's line | /r/MadeOf | the apex
Facets:
value: on the cone surface
type: LOCATION
Source sentences:
text: The intersection of an upright cone by a plane π {\displaystyle \pi } , whose inclination from vertical is the same as a generatrix (a.k.a. generator line, a line containing the apex and a point on the cone surface) m 0