What 3d shape has 8 faces 19 edges 12 vertices?
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.