Octahedron
01
八面体, オクタヘドロン
a geometric figure with eight triangular faces, twelve edges, and six vertices
例
The faces of an octahedron are all equilateral triangles, and each vertex is the meeting point of four triangles.
八面体の面はすべて正三角形であり、各頂点は4つの三角形の交点です。
The eight faces of an octahedron divide space into regions that are congruent to tetrahedra.
八面体の8つの面は、空間を四面体と合同な領域に分割します。
