Keywords: Plimpton 322.jpg Plimpton 322 Babylonian tablet listing pythagorean triples image copied from http //www math ubc ca/~cass/courses/m446-03/pl322/pl322 html 1800 BCE uploaded 13 September 2006 photo author unknown public domain because of age PD-Art Trigonometry Babylonian mathematics Clay tablets by region Cuneiform text with columns |