Babylonian tablet preserves student's 4,000-year-old geometry mistake

[Still Waters]

A small clay tablet from the site of Kish in Iraq reveals a student calculated the area of a triangle incorrectly 4,000 years ago.

This round clay tablet, which is in the collection of the Ashmolean Museum at the University of Oxford, is one of two dozen examples of ancient Babylonian mathematics homework found at the archaeological site of Kish in 1931.

https://www.livescience.com/archaeology/babylonian-tablet-preserves-students-4-000-year-old-geometry-mistake