Prove that any two opposite edges in a regular tetrahedron are perpendicular.

Prove that any two edges in a regular tetrahedron are perpendicular.

The angle between any two opposite pair of edges of a regular tetrahedron (i.e all faces are equilateral triangles) is

If volume of a regular tetrahedron of edge length k is V and shortest distance between any pair of opposite edges of same regular tetrahedron is d,then find the value of (d^(3))/(V)

Prove that in a tetrahedron if two pairs of opposite edges are perpendicular , then the third pair is also perpendicular.

Prove that in a tetrahedron if two pairs of opposite edges are perpendicular , then the third pair is also perpendicular.

Prove that in a tetrahedron if two pairs of opposite edges are perpendicular,then the third pair is also perpendicular.

Prove that in a tetrahedron if two pairs of opposite edges are perpendicular , then the third pair is also perpendicular.

Prove that in a tetrahedron if two pairs of opposite edges are perpendicular , then the third pair is also perpendicular.

The shortest distance between any two opposite edges of the tetrahedron formed by planes x+y=0, y+z=0, z+x=0, x+y+z=a is constant, equal to

The shortest distance between any two opposite edges of a tetrahedron formed by the planes y+z=0, x+z=0, x+y=0 and x+y+z=sqrt(6) is