A cylinder and a cone - are two entirely different 3D shapes. A cylinder has three faces & two edges. A cone has two faces and one edge.
The rule applies to POLYHEDRA (3D shapes) not Polygons, which are 2D Faces + Vertices - Edges = 2
6 faces, 12 edges
Such a shape does not exits. See the attached link for all 3d shapes with 6 plane faces.
A triangular prism has nine edges, three edges that are parallel to each other on the top and bottom of the prism, and three surrounding edges. It also has five faces and six vertices.
Spheres
cylinder
A cube has 6 faces
none of them. The cube has parallel and perpendicular and os does the cuboid.
sphere
They are faces such that the perpendicular distance between them is the same wherever on either face you measure it.
5 edges, 5 verts, and faces are only on 3d shapes, for the most part, so any 2d shape has 1
no. a 2d square has only 1 face but a 3d square (cube) has 6 faces.
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 cylinder and a cone - are two entirely different 3D shapes. A cylinder has three faces & two edges. A cone has two faces and one edge.
A cube and a regular octahedron have the same number of edges, vertices, and faces. Both have 12 edges, 8 vertices, and 6 faces.
A cylinder has two parallel congruent faces and a curved surface.