One flat face and one curved face.
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A hemisphere as two faces (one curved and one plane), one edge and no vertices.
There are many. All polyhedra have ONLY flat faces but many other shapes have flat faces such as a hemisphere or an octant or a cylinder.
A hemisphere has one edge, two faces and no vertices.
Hemisphere: 2 faces, 1 edge, 0 vertices Square-based pyramid: 5 faces, 8 edges, 5 vertices Cube: 6 faces, 12 edges, 8 vertices
One edge, no vertices and two faces.