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An octahedron is not a polygon. A polygon is a two dimensional shape. An octahedron is a three dimensional shape and is classified as a polyhedron.
The equivalent of a octahedron as a 2D shape is an 8 sided octagon.
An octahedron has eight faces. If it has 62 faces then it is not an octahedron!
An octahedron is a closed 3-d shape with 8 polygonal faces. There are 257 topologically different convex octahedra. An octahedron can have triangles for all eight faces or, as is the case with a hexagonal prism, not a single triangular face.
An octahedron is a closed 3-d shape with 8 polygonal faces. There are 257 topologically different convex octahedra. It is possible for some of these faces to be right angled.