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sada
There isonly one metric system, the SI system (Le Système international d'unités),
a metric ruler is a different way of measuring things and with measuring there is the English system (inches feet etc) and the metric system (centimeters meters etc)
-- meter -- kilogram -- second
Yes. There is an international metric system and is used in many countries.
"Metric" is a whole system of weights and measurements. Many different devices are used to measure things in the system.
There is exactly 2 the metric system and the customary system
sada
NONE! A kilometer, symbol km) is a unit of length in the metric system. A liter is a unit of volume in the metric system. They are totally different.
There isonly one metric system, the SI system (Le Système international d'unités),
a metric ruler is a different way of measuring things and with measuring there is the English system (inches feet etc) and the metric system (centimeters meters etc)
It is 16 mm, whether or not in the metric system!
-- meter -- kilogram -- second
Yes. There is an international metric system and is used in many countries.
THE METRIC SYSTEM WONDERLAND or THE WONDERS OF THE METRIC SYSTEM
The metric system is widely used because it is international (used in many different countries) and use units not based on anthropomorphic measures like foot and is based on decimal arithmetic considered easier for calculation..
In many European countries the metric system IS the customary system!