a circle has no face
a sphere on the other hand does
The answer is - a cone.
a cylinder
flat
A "hemisphere" - a ball that's been cut into 2 equal parts. i.e "half a sphere".
A shape with 1 vertex, 1 edge, 1 flat face, and 1 curved face is a cone. The vertex is the tip of the cone, the edge is the circular base where the flat face meets the curved surface, and the flat face is the circular base itself. The curved face extends from the base to the vertex.