The meter ruler was not invented by a single individual, but rather was established as a unit of measurement by the French Academy of Sciences in the late 18th century. The meter was originally defined as one ten-millionth of the distance from the North Pole to the Equator along a meridian passing through Paris. The meter ruler, a physical representation of this unit of length, has since become a standard tool for measuring length in the metric system.
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It was invented by a Greek engineer known as Theodorus of Crete.
The ruler was invented by a person known as Theodorus of Crete. He lived around 6th century BC and was a Greek engineer, sculptor and architect.
Because it is difficult to wrap a metre ruler around someone's head.
We do not know, this information was never recorded, but it is evident from the buildings of the ancients that standard units for length were in use then.
A ruler can be classed as a straight edge.
Ruler