Unknown008
Oct 2, 2010, 11:30 PM
I have no idea what you are asking for. Your question is very vague.
You could perhaps use a measuring device like a ruler for a short distance, or a measuring tape for longer ones.
In case it is a line on a cartesian plane, you can use Pythagoras' Theorem.
You could perhaps make use of the cosine rule if you have a triangle with an angle theta between the two other sides.
A^2 = B^2 + C^2 - 2ABcos(\theta)
Or the sine rule:
\frac{A}{sin(a)} = \frac{B}{sin(b)} = \frac{C}{sin(c)}
As I said before, your question is vague. :(