There are many options. Some of these are:
A pyramid with a base that is a 19 sided polygon;
A dipyramid with a "centre" that is an 18 sided polygon;
A prism with decagonal bases.
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According to Euler none; for all 3d shapes: Vertices + Faces = Edges + 2 ⇒ 12 + 8 = 19 + 2 ⇒ 20 = 21 So unless 20 does equal 21, no 3d shape has 8 faces, 19 edges and 12 vertices. Any 3d shape with 8 faces would be an octahedron.
polyhedron
A sphere...
sides are the face of a 3d shape and verticies are the corner of the shape
Yes, the Platonic solids (excluding the sphere which does not have vertices).