A line segment connecting nonadjacent polyhedron vertices sharing a common face in a parallelepiped or other similar solid.
Face Diagonal
See also
Cuboid, Euler Brick, Parallelepiped, Perfect Cuboid, Polygon Diagonal, Polyhedron Diagonal, Space DiagonalExplore with Wolfram|Alpha
References
Guy, R. K. Unsolved Problems in Number Theory, 2nd ed. New York: Springer-Verlag, p. 173, 1994.Referenced on Wolfram|Alpha
Face DiagonalCite this as:
Weisstein, Eric W. "Face Diagonal." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/FaceDiagonal.html