Old Babylonian tablet likely used for surveying uses Pythagorean triples at least 1,000 years before Greek mathematician Pythagoras An Australian math

Australian mathematician discovers applied geometry engraved on 3,700-year-old tablet

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2021-08-04 15:30:05

Old Babylonian tablet likely used for surveying uses Pythagorean triples at least 1,000 years before Greek mathematician Pythagoras

An Australian mathematician has discovered what may be the oldest known example of applied geometry, on a 3,700-year-old Babylonian clay tablet.

The tablet dates from the Old Babylonian period between 1900 and 1600 BCE and was discovered in the late 19th century in what is now Iraq. It had been housed in the Istanbul Archaeological Museum before Dr Daniel Mansfield from the University of New South Wales tracked it down.

Mansfield and Norman Wildberger, an associate professor at UNSW, had previously identified another Babylonian tablet as containing the world’s oldest and most accurate trigonometric table. At the time, they speculated the tablet was likely to have had some practical use, possibly in surveying or construction.

That tablet, Plimpton 322, described right-angle triangles using Pythagorean triples: three whole numbers in which the sum of the squares of the first two equals the square of the third – for example, 32 + 42 = 52.

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