MEASURING LENGTH

In ancient time , people had used their body parts to measure length

The oldest units of measurement were based on parts of the human body.

Nowadays, the metric system is used in the most of the world.

UNITS OF LENGTH ARE millimeter, centimeter, meter and kilometer.

The smallest unit of length is millimeter.

The largest unit of the length is km.

In order of unit of metric system(length) are from larger to smaller that are km, m, cm, and mm.