A prism with an n-sided base will have 2n vertices, n + 2 faces, and 3n edges.
16 vertices
cubes and rectangular prisms
There are an infinite number of 3d shapes. For example you can have an infinite number of prisms with ends that are triangular, quadrilateral, or in the shape of any polygon.
Cone
It is an octagonal prism
8
An octagonal prism, possibly.
An octagonal pyramid.
cubes and rectangular prisms
octagonal prism
It could be an octagonal based pyramid
There are an infinite number of 3d shapes. For example you can have an infinite number of prisms with ends that are triangular, quadrilateral, or in the shape of any polygon.
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)
Cone
It is an octagonal prism
8
10
1