A cone.
cornet
2 faces (around the curved part and the flat base) 1 vertex (the point at the top) 1 edge (where the curved section meets the flat base)
A cone has two faces: one around (the curved part), and one on the flat base. It has one vertex at the point at the top and one edge where the curved section meets the flat base.
A cone does not have a vertex. A vertex is defined as a point where two lines meet; a triangle has three vertices, and the angular face of a pyramid has a vertex. However, a cone is a three-dimensional figure and has a curved surface. The base of a cone is circular. The top of the cone is a single point called the apex of the cone.
Two nappes of a right circular cone meet at a point called the vertex.
cornet
It is a point where one line (straight or curved) meets another line or a non-coplanar surface.
it is a three dimensional cone , the circle is the edge of the figure and the curved side is the body of the cone, the vertex is the point of the cone
A curved surface area can be described as one where the gradient of the normal to the surface changes smoothly from point to point.
a cone
A surface having no equivalent point at any plane
You're probably thinking of a cone. There is some disagreement as to whether the point of a cone qualifies as a vertex.
A cone.
A sphere
A tangent
Cone
2 faces (around the curved part and the flat base) 1 vertex (the point at the top) 1 edge (where the curved section meets the flat base)