It is the vertex. It can also be called the apex but that has a connotation of being the top-most point and so is not appropriate when both nappes are concerned.
Two nappes of a right circular cone meet at a point called the vertex.
It will be a hyperbola.
An Ellipse
hyperbola
ellipse
Two nappes of a right circular cone meet at a point called the vertex.
edge-Apex
A hyperbola
A line is produced
if a right circular cone intersects a plane that goes through both nappes of the cone, but not through the vertex, the resulting curve will be a hyperbola
Hyperbola
The intersection forms a hyperbola.
A hyperbola.
It will be a hyperbola.
An Ellipse
hyperbola
hyperbola