Assertion: curve's length | /r/HasProperty | the distance
Facets:
value: from the vertex
type: LOCATION
value: between focus
type: OTHER
value: to the focus
type: TRANSITIVE-OBJECT
Source sentences:
text: It is shown above that this distance equals the focal length of the parabola, which is the distance from the vertex to the focus.
text: Let the length of the chord between the points where it intersects the parabola be c and the distance from the vertex of the parabola to the chord, measured along the axis of symmetry, be d.
text: As stated above in the lead, the focal length of a parabola is the distance between its vertex and focus. ^
text: then the vector (cos α, sin α) is parallel to the segment PX, and the length of PX, which is the distance from the tangent line to the origin, is