3D Line Equations and Skew
Intersecting Lines Distance Calculation
Let the lines L
1:

λ∈ℝ and

+

μ∈ℝ intersect at the point R. Let P and Q be the points lying on lines L
1 and L
2, respectively, such that

and

If the point P lies in the first octant, then 27(QR)
2 is equal to -