Infinitely many. There are infinitely many lines from the apex to the base. Every point on each of these lines is on the surface of the cone.
One.
yes, they are the 2 straight lines
There is one face in a cone. It is at the bottom.
the cone has three sides
2 sides, the base and the cone.
A cone does not have any parallel lines
If it is a right circular cone, it has an infinite number of planes of symmetry. If it is an oblique circular cone, it has one plane of symmetry.
None. A right cone has no vertical lines. And what is a cone if it is not three dimensional?
Generally, none.
One, but it wraps all the way around the cone.
One.
O par ell lines and no congruent lines
The axis of a right circular cone is perpendicular to every radius or diameter of the base.
yes, they are the 2 straight lines
Maybe a cylinder or a cone
Specifically there really isn't a corner becaice it is when two lines meet but there is no line so it is really a vertice
The intersection of a right circular cone and a plane that is parallel to the edge of the cone is a parabola. However, if the vertex of the cone lies on the plane, then the intersection is simply two intersecting lines.