Sentence Examples


  • The regular octahedron has for its faces equilateral triangles; it is the reciprocal of the cube.
  • The equilateral triangle is the basis of the tetrahedron, octahedron and icosahedron.'
  • Two such sets placed base to base form the octahedron, which consequently has 8 faces, 6 vertices and 12 edges.
  • Ladenburg's prism formula would give two enantiomorphic ortho-di-substitution derivatives; while forms in which the hydrogen atoms are placed at the corners of a regular octahedron would yield enantiomorphic tri-substitution derivatives.
  • The octahedral formula discussed by Julius Thomsen (Ber., 1886, 19, p. 2 944) consists of the six carbon atoms placed at the corners of a regular octahedron, and connected together by the full lines as shown in (I); a plane projection gives a hexagon with diagonals (II).
 

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