Vectors

I think that it's likely that what's being referred to in this question are lines in space rather than vectors.

I'm picturing two non-coincident parallel lines with a third line passing through and at right angles to each one of them. Using the third line as an axis, one of the lines is rotated through some angle and the object of the exercise is to find that angle.

Hi 315,

I know almost nothing about vectors so I am hoping to learn from your question too.

If two vectors are skew then that means that they are not coplanar.

It seems to me that if the vectors are parallel then they have to be coplanar.  

So, what are skew parallel vectors?

Thank you Melody to richness my topic.  

Any one? 

Vectors are either skew (in 3-d) or parallel or they intersect.  If they are parallel they are at an angle of zero relative to each other.  If they intersect you can find the angle using the dot product.

I don't know what it means to find the angle between skew vectors.  In general you would need to project them onto the same plane to find an angle, and this could be different depending on which plane you project onto. However, my knowledge of skew vectors is limited so perhaps I'm wrong.

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Thanks Alan and Bertie :)