Further Pure > Vectors > Flashcards
Distance between parallel lines
(mod (A->P x d)) / mod (d)
Distance between skew lines
(d1 x d2) / mod (d1 x d2) . (a1-a2)
Shortest distance from a point to a plane
(n1x + n2y + n3z + d) / sqrt (n1^2 + n2^2 + n3^2)