Who invented the ruler primary source?

It's impossible to definitively say who "invented" the ruler in the sense of being the first person to create one.

Here's why:

* Ancient Origins: Rulers, or tools for measuring length, have existed for millennia. Ancient civilizations like the Egyptians, Babylonians, and Romans all had their own methods for measuring, often using sticks, ropes, or knotted cords.

* Evolution of Measurement: Measuring tools evolved over time, becoming more precise and standardized. Early rulers might have been simple sticks marked with rough measurements, while later ones used more sophisticated materials and markings.

* No Single Inventor: The development of the ruler was likely a gradual process with contributions from many individuals across different cultures and eras.

Therefore, attributing the invention of the ruler to a specific person is not feasible.

Instead, we can recognize that the development of measuring tools is a testament to human ingenuity and the need to establish standards for precise measurement throughout history.