a cone
CONE
Any polyhedron.
cone
A cone.
a coneA cone.
Cone
None
A 3D shape with one vertex is called a cone. It has a circular base and a single apex (the vertex) where all the lines from the base converge. The shape tapers smoothly from the base to the vertex, creating a pointed top. Other examples of shapes with one vertex include certain types of pyramids, but cones are the most common reference for this characteristic.
a cone
cone
A cone seems to fit the given description
A cone, like an ice cream cone.