As I have already answered to your previous identical question, the answer is a triangular based pyramid. Please do not post the same question over and over again if you do not get an answer immediately, as this will only result in irritating the people who strive to help people like you.
Chat with our AI personalities
# of faces + # of edges + # of vertecies + 2
Sphere
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.
A pyramid
Hexagonal prism