Left- Algebraic-geometrical tablet involving triangles described by a perpendicular drawn from the right angle to the hypotenuse (similar to Euclid’s theory), from Tell Harmal, datable to the early 2nd millennium BCE.

Right- Clay tablet deciphered as an algebraic-geometrical problem involving a rectangle whose diagonal and area are given and it is required to find its length and width. It is solved in the same way reputed as the Pythagorean theorem, found at Tell Harmal, datable to the early 2nd millennium BCE.

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