cone
It is called a cone.
A right cylindrical cone has a circle for a base and one vertex. a diagram is shown on unitmath.com
cone
L shape
A two-faced object with one vertex is a shape known as a "cone." A cone has a circular base, which is one face, and a pointed tip at the top, which is its vertex. The other face is the curved surface that connects the base to the vertex. Thus, it effectively has two distinct faces: the base and the curved surface.
A cone.
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A cone
it is a cone.
It is called a cone.
One possible answer is an infinite cone. Spheres have one face but no vertex. No physical 3-D shape can have a vertex without having more than one face (a real cone typically has two: side and bottom).
a cone
How about a sphere as an example that fits the given description
A right cylindrical cone has a circle for a base and one vertex. a diagram is shown on unitmath.com
cone
L shape
A cone.