retangle
pyramid
Sphere ( 0 faces , 0 edges , 0 vertices )
It is a triangular prism that has 6 vertices, 9 edges and 5 faces.
An octagonal prism, possibly.
Cylinder
An ellipsoid with a slice removed.
retangle
pyramid
octagon
Sphere
Sphere ( 0 faces , 0 edges , 0 vertices )
That 3D shape is called triangular pyramid.
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.
Yes, the Platonic solids (excluding the sphere which does not have vertices).
A solid cone has 2 faces and 1 edge
edge