cone
Cone
An infinite cone.
The given description fits that of a cone
There's no shapes that has 1 vertex, but there's a shape with 1 face and that is sphere (ball).
It is a cone
cone
A cone.
A cone. The base is circular and curved, and the tip of the cone is the vertex.
A cone.
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Cone
An infinite 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
The given description fits that of a cone
cone