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# FP3 cross product equals zero watch

1. Hi,

I've been told that a line, , has equation:

X

Now, I know that this means that the vectors:

and

are parallel.

I think that it also mean that is parallel to and therefore also parallel to but I'm having difficulty visualizing this and justifying why I think it.

Does anyone know if this is true, and if so why?

Thank you
2. (Original post by so it goes)
I think that it also mean that is parallel to and therefore also parallel to but I'm having difficulty visualizing this and justifying why I think it.

Does anyone know if this is true, and if so why?

Thank you
Yes, it's true.

The line is the line , offset by , viz.

3. (Original post by ghostwalker)
Yes, it's true.

The line is the line , offset by , viz.

Right, that makes sense thank you!

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Updated: January 20, 2014
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