a sphere
A solid figure with eight vertices and all faces of equal size is called a cube. Each face of a cube is a square, and a cube has 8 vertices and 6 faces.
6
sphere
There is no such polyhedron.
A hemisphere
The solid figure that has the same number of faces and vertices and has 8 edges is a cube. A cube has 6 faces, 8 vertices, and 12 edges, so it fits the description given.
Tetrahedron: 4 equilateral triangle faces and 4 vertices.
A Cylinder.
A square based pyramid
A square-based pyramid.
cube
cube