Geometry

Measuring line segment

If you are given a line segment of any length, then you can measure it with the help of ruler.

Suppose we have to measure the length of line segment \(\overline{AB}\) given below.

Put a ruler along the line segment \(\overline{AB}\) in such a way that one of its edges touches both the points R and S and o mark of its ruler

Now read the ruler mark at B.

We see that the point B is coinciding with 17 on the scale.

Hence, length of \(\overline{AB}\) is 17