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Regular octahedron (octahedral) is a three-dimensional body, whose faces consists of eight identical equilateral triangles. Octahedron has 6 vertices, 12 edges, 8 walls.
**Mathematical formulas**:
The volume of an octahedron:
V = (⅓ ∙ √2) ∙ a³
The surface of the octahedron:
S = a² ∙ 2 ∙ √3
