How can you measure the length of a curved wire using a thread ?
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A wire cannot be measured by a straight scale, a thread must be used instead. To measure a curved line using a thread, follow the below steps:
- Tie a knot at one end of the thread.
- Place the thread at the beginning of the wire and try to measure a small initial portion of the wire which is relatively straight.
- Place your thumb at the other end of the measured portion and measure next straighter portion.
- Repeat the above step till the end of wire is reached. Make a knot at the end of the wire.
- Now, straighten the thread and measure the length of the two knots on a scale.
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