Question

Define length. Give its various units.

Answer 1

1. Length is defined as the straight line distance between two points.
2. Its SI unit is metre.
3. Metre is denoted by the symbol m.

Other units of length:

1. Different objects have different lengths.
2. So we have different units to measure length.
3. Sometimes we need to measure a very large distance and sometimes a very short distance.
4. Accordingly, we choose the unit to measure the length.
5. Other units are:

1. Millimetre (mm)
2. Centimetre (cm)
3. Decimetre (dm)
4. Metre (m)
5. Kilometre (km)
6. Inch (inch)
7. Foot (ft)
8. Yard (yd)
9. Astronomical unit (AU)