The shortest distance between a diagonal of a unit cube and the edge skew to it, is

The edge of a cube is of length of a. The shortest distance between the diagonals of a cube an edge skew to it is ........

If in a cube of edge of length 6sqrt(2) ,then shortest distance between a diagonal and an edge not meeting it, is

The shortest distance between a diagonal of a cube, of edge-length one unit and the edge not meeting it, is

The angle between a diagonal of a cube and one of its edges is

Angle between a diagonal of a cube with edge of lenth 1 is

The angle between a diagonal of a cube and the diagonal of a face of the cube is