Question

Using a thread how will you find the circumference of a one-rupee coin?​

Answer 1

Circumference is basically the length of the boundary of the circle. For finding it we can do so by taking a thread and roll it around the coin then we will measure the length of the thread and it will be the circumference of that coin. Also circumference = 2πr, where r is radius.

Answer 2

Answer:

Take a thread. Round it completely (one time) around the side of coin. Mark the point where it is completely rounded. Measure the length of the thread from the starting point to the mark point