triangular pyramid
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It is a polyhedron.
cube pyramid cylinder * * * * * 3-d objects with only flat surfaces (a different question) are polyhedra.
A solid figure with 2 flat surfaces and 0 vertices is a cylinder. A cylinder has two circular flat surfaces, known as bases, and no vertices because it does not have any corners or points where edges meet. It is a three-dimensional shape that is formed by a curved surface connecting the two bases.
Like 3D. Looks like you can hold it. It's not flat
There can be no such shape. If there were a shape with n flat surfaces, then if you sliced off one vertex, you would have a shape with n+1 flat surfaces. So it is always possible to add one more flat surface.