If you mean 1 flat surface and 1 vertex, then the only thing I can think of is a cone.
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Cone
The object described is a cone. A cone has one vertex (the point where the flat face meets the curved surface) and one flat face (the circular base). Due to its shape, a cone can roll along a flat surface smoothly.
It is a face.
The only thing I can think of is a cone.
It has a flat base, a curved surface area, a circular edge and one vertex.