Question

Explain how one can measure length of a curved line using a string.

Answer 1

One can measure the length of a curved line using a string and a ruler.
In this method, the following steps are taken:

• Take a non-stretchable string and tie a knot at one of its ends.
• Place the knotted end of the thread at one end of the curved line.
• Hold the string steadily with your fingers and stretch it along the curved line until you reach the other end.
• Make a mark on the thread where it reaches the other end.
• Place the string along a ruler and measure the length between the knot and the marked point.

Thus, the length of a curved line is measured using a string.