# Thread: Finding parallel vectors in 3 dimensions

1. ## Finding parallel vectors in 3 dimensions

Having a vector start at the origin and go to some vector, <a, b, c>, and given a second vector in the same form <x, y, z>, is there a way to tell that they're parallel.

Graphing them out is the only way I can do this, I'm sure there's a better method for doing this task.

2. For one thing two parallel vectors are co linear (on the same line), so if (a,b,c) and (x,y,z) are parallel there exists some coefficient K such that (a,b,c)=K(x,y,z). Moreover, if two vectors are parallel, their cross product is zero.