How do you find the length of a line?

Answer 1

It depends on what information you have. You could use a ruler or tape measure.

Or, if the information is given in the foorm of the coordinates of the end points you could find the length as follows: if the coordinates of the two end points are (a,b) and (c,d) then the length is

sqrt[(a - c)2 + (b - d)2]