By definiton, an octagonal building would have 8 outer walls. It could also have any number of internal walls.
I have started to make Dove cotes bird houses that are octagonal in shape, the roof also joins the walls and narrows at the top also ending in an Octagonal but much smaller
florence baptisery
16
An octagonal shape has 8 sides
The octagonal pyramid has 9 vertices.
An octagonal pyramid has eight sides to it
An octagonal prism has 16 vertices.
The Octagonal Raven has 432 pages.
"Octagonal" is an adjective. That is not enough information. Is it an octagonal prism, octagonal pyramid, octagonal bipyramid or something else? Each one would lead to a different answer.
If you mean how many vertices are on an octagonal based pyramid then it has 9 vertices.
An octagonal prism has 16 vertices (or corners).An octagonal prism has 16 vertices (or corners).An octagonal prism has 16 vertices (or corners).An octagonal prism has 16 vertices (or corners).
A octagonal prism has 32 right angles!!!!!