In geometry, an octahedron is a polyhedron with eightfaces.
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Eight.
An octahedron is a closed 3-d shape with 8 polygonal faces. There are 257 topologically different convex octahedra. An octahedron can have 6 to 12 vertices.
An octahedron: two quadrilateral based pyramids with their bases together.
Octahedron
octahedron