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Octahedron
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八面体
a geometric figure with eight triangular faces, twelve edges, and six vertices
octahedron
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例
The dual of an octahedron is a cube, and vice versa, forming a pair of dual polyhedra.
The eight faces of an octahedron divide space into regions that are congruent to tetrahedra.
The faces of an octahedron are all equilateral triangles, and each vertex is the meeting point of four triangles.
The vertices of an octahedron can be inscribed in a cube, forming a relationship between these two geometric shapes.
