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An octahedron has eight faces. If it has 62 faces then it is not an octahedron!
An octahedron has eight bases/faces.
An octahedron has 8 sides.
A "dodeca" is a prefix: it is not a shape. An octahedron has eight faces.
An octahedron has8 faces, 12 to 18 edges and 6 to 12 edges.