rhombohedron การใช้

• The internal diagonals of the rhombohedron shown in Fig.
• The cube is also a square parallelepiped, an equilateral cuboid and a right rhombohedron.
• Amongst other allegorical symbols, the picture includes a magic square and a truncated rhombohedron.
• The volume of this rhombohedron is 0.8789, and the height is 0.9242.
• The unit cell is a rhombohedron ( which gives the name for the rhombohedral lattice system ).
• However, two regular tetrahedra can be combined with an octahedron, giving a rhombohedron that can tile space.
• A special case of a rhombohedron is one in the which the rhombi which form the faces have angles of 60?and 120?
• The prismatic crystals are often terminated by the scalenohedron and the obtuse rhombohedron, thus resembling calcite ( dog-tooth-spar ) in habit.
• Four points forming non-adjacent vertices of a rhombohedron necessarily form the four vertices of an orthocentric tetrahedron, and all orthocentric tetrahedra can be formed in this way.
• In geometry, a "'rhombohedron "'is a three-dimensional figure like a cube, except that its faces are not squares but honeycomb with rhombohedral cells.
• As the area of the base is given by a ^ 2 \ sin \ theta and it follows that the height of a rhombohedron is given by the volume divided by the area.
• Each primary parallelohedron is combinatorially equivalent to one of five types : the rhombohedron ( including the cube ), hexagonal prism, truncated octahedron, rhombic dodecahedron, and the rhombo-hexagonal dodecahedron.
• For example, for the unit rhombohedron with rhombic acute angle of 72, the three internal diagonals ( BG, CF, and DE ) are 1.543 and the long diagonal ( AH ) is 2.203.
• For a unit rhombohedron ( side length = 1 ) whose rhombic acute angle is ? and has one vertex is at the origin ( 0, 0, 0 ) with one edge lying along the x-axis the three vectors are
• For example, in body-centered ( bcc ) or face-centered ( fcc ) cubic crystals, the primitive cell is a parallelepiped or rhombohedron, respectively, but the conventional unit cell used to describe these structures is a simple-cubic supercell.
• Founder Hanks spoke of Theta Tau to his friend, Robert Downing, a member of the Rhombohedron Club at Michigan College of Mines; after correspondence and an inspection trip by Brother Hanks, the club ( established in 1903 ) was installed as Beta Chapter in 1906.
• He is perhaps best known to New Yorkers for " Red Cube, " a 28-foot rhombohedron tipped on end at Broadway and Liberty Street, and " News, " a stainless-steel relief at the Associated Press Building, 50 Rockefeller Plaza.