2 solid shapes together have 8 faces, 12 edges 8 vertices
octagon
1. A cube & 2. A rectangular prism
Vertices are the points where edges meet and form an angle.
There is no 3d shape made up of octagons. An octahedron can be one of several different shapes - but without ANY octagonal faces. For example, A hexagonal pyramid (8 faces, 18 edges, 12 vertices) A heptagonal pyramid (8 faces, 14 edges, 8 vertices) A quadrilateral dipyramid (8 faces, 12 edges, 6 vertices)
2 solid shapes together have 8 faces, 12 edges 8 vertices
octagon
A cube or a cuboid both have 8 corners which are known as vertices
Rectangular pyramids
Pyramid
cube 8
Pentagon
1. A cube & 2. A rectangular prism
cubes and rectangular prisms
A quadrilateral based pyramid
A vertex is a corner where two sides meet. With flat shapes like triangles and octagons they are often called angles. An octagon has 8 vertices, and 8 sides.
Any smooth shape has no vertices.