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  2. Face diagonal - Wikipedia

    en.wikipedia.org/wiki/Face_diagonal

    In geometry, a face diagonal of a polyhedron is a diagonal on one of the faces, in contrast to a space diagonal passing through the interior of the polyhedron. [1] A cuboid has twelve face diagonals (two on each of the six faces), and it has four space diagonals. [2] The cuboid's face diagonals can have up to three different lengths, since the ...

  3. Space diagonal - Wikipedia

    en.wikipedia.org/wiki/Space_diagonal

    In geometry, a space diagonal (also interior diagonal or body diagonal) of a polyhedron is a line connecting two vertices that are not on the same face. Space diagonals contrast with face diagonals, which connect vertices on the same face (but not on the same edge) as each other. [1] For example, a pyramid has no space diagonals, while a cube ...

  4. Diagonal - Wikipedia

    en.wikipedia.org/wiki/Diagonal

    The diagonals of a cube with side length 1. AC' (shown in blue) is a space diagonal with length , while AC (shown in red) is a face diagonal and has length .. In geometry, a diagonal is a line segment joining two vertices of a polygon or polyhedron, when those vertices are not on the same edge.

  5. Cube - Wikipedia

    en.wikipedia.org/wiki/Cube

    The face diagonal of a cube is the diagonal of a square , and the space diagonal of a cube is a line connecting two vertices that is not in the same face, formulated as . Both formulas can be determined by using Pythagorean theorem .

  6. Euler brick - Wikipedia

    en.wikipedia.org/wiki/Euler_brick

    One edge, face diagonal or space diagonal must be divisible by 29. One edge, face diagonal or space diagonal must be divisible by 37. In addition: The space diagonal is neither a prime power nor a product of two primes. [9]: p. 579 The space diagonal can only contain prime divisors that are congruent to 1 modulo 4. [9]: p. 566 [10]

  7. Hermann–Mauguin notation - Wikipedia

    en.wikipedia.org/wiki/Hermann–Mauguin_notation

    a, b, or c glide translation along half the lattice vector of this face. n glide translation along half a face diagonal. d glide planes with translation along a quarter of a face diagonal or of a space diagonal. e two glides with the same glide plane and translation along two (different) half-lattice vectors.

  8. NuFACE Mini vs Solawave Radiant Renewal Wand: I Compared the ...

    www.aol.com/nuface-mini-vs-solawave-radiant...

    Before and after using Solawave Wand. $189; $113 at amazon. $207; $189 at solawave. Which Device Is More Effective? As I mentioned up top, I find that both the NuFACE Mini and the Solawave Radiant ...

  9. Parallelepiped - Wikipedia

    en.wikipedia.org/wiki/Parallelepiped

    One example has edges 271, 106, and 103, minor face diagonals 101, 266, and 255, major face diagonals 183, 312, and 323, and space diagonals 374, 300, 278, and 272. Some perfect parallelepipeds having two rectangular faces are known. But it is not known whether there exist any with all faces rectangular; such a case would be called a perfect ...