Question

Explain two methods you can use to measure the length of a curved line.

Answer 1

One can measure the length of any curved line by two methods.

These two methods are following -

a. by using the measuring tape.

b. by calculating the circumference of the semi-circle.

A curved line is referred as the arc.

It can be said as the portion of a circle.

If the diameter of the circle is given, one can calculate the length of curved line by using this formula - length of any arc = diameter x 3.14 x angle divided by 360.

Answer 2

Answer:

A curved line or surface cannot be measured by a straight scale, a measuring tape or thread must be used instead. To measure a curved line using a thread, follow the below steps:

1. Make a knot at the end of the line.
2. Place the thread at the beginning of the line and try to measure a small initial portion of the line which is relatively straight.
3. Place your thumb at the other end of the measured portion and measure next straighter portion.
4. Repeat the above step till the end of line is reached. Make a knot at the end of the line.
5. Now, straighten the thread and measure the length of the two knots on a scale.

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