What is length?

Length is a base element in most systems of measurement. It is a measure of distance. We can define the length of an object as the amount measured from one end to the other along the longest side. For sure length has the dimension of distance.

Throughout different civilizations and cultures, a lot of length units had been used. Nowadays, length units differs very much between neighboring towns and cities.

Keep in mind that the metric system and the customary system are the systems used now to measure length.

Kilometer, meter and centimeter are the most common units to measure length in the metric system. On the other hand, mile, yard and foot are the most common units for length measurement in the customary system.

There are three countries that have not adopted the metric system of units yet and they are Burma, Liberia, and the US.
Note that Meter (m) is the most important unit of length. Thus, 1 m = 100 cm and 100 cm = 1 m

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