
Inscribed on a 3-year-old Babylonian clay tablet is the world's oldest example of applied geometry.
It is a cadastral document, drawn up by an expert to resolve a dispute regarding the division of a piece of land, where right angles are drawn using the Pythagorean triple system over 1 years before it was formulated by the Greeks.
The clay tablet, found in Iraq in 1894 and marked with the initials Si.427, "is the only known example of a cadastral document from the ancient Babylonian period".
The discovery is of great importance for the history of mathematics because "no one expected the Babylonians to use Pythagorean triples in this way," they write.
For terrestrial applications, the Babylonians reportedly used a tablet, labeled Plimpton 322, which was a kind of manual for solving their practical problems: a very different strategy from the trigonometry of the Greeks, conceived by observing the stars in the XNUMXnd century BC Christ.
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