8 faces, 6 vertices and 12 edges
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An octahedron is a closed 3-d shape with 8 polygonal faces. There are 257 topologically different convex octahedra. The properties of octahedra will depend on which of these 257 shapes you have in mind. Furthermore, the properties of any of these octahedra can be modified if the shape is altered by stretching of skewing (twisting) the shape.
An octahedron has eight faces. If it has 62 faces then it is not an octahedron!
An octahedron has eight bases/faces.
rectangle and octahedron
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.