A regular octagon Edges and vertices 8 Schläfli symbols 's contained with a regular octagon. Image:Great dirhombicosidodecahedron vertfig.png|The vertex figure of the uniform polyhedron, great dirhombicosidodecahedron's contained within an irregular 8-sided star polygon, with four edges going through its center. Image:Octagonal prism.png|An octagonal prism contains two octagons. Image:Tiling Semiregular 4-8-8 Truncated Square.svg|The truncated square tiling has 2 octagons around every… (More on Octagon)