One.
none
Find out your selfs
1 face, 1 edges & 0 vertices
A cube has twelve edges.
A hemisphere does not have edges or corners. It has only one face. A hemisphere is one half of a circle.
One.
none
It has one circular edge.
it only has 1 ok
Find out your selfs
No vertices, one edge.
1 face, 1 edges & 0 vertices
It has 1 circular edge at its base
No.
A hemisphere has no edges. It has one curved surface that smoothly transitions from the curved side to its base.
A hemisphere as two faces (one curved and one plane), one edge and no vertices.