Answer:
The metric system
Explanation:
Because the exact definition is "the decimal measuring system based on the meter, liter, and gram as units of length, capacity, and weight or mass. The system was first proposed by the French astronomer and mathematician Gabriel Mouton (1618–94) in 1670 and was standardized in France under the Republican government in the 1790s." therefore it would be the metric system because it uses different lengths