Numbers in Mesopotamian Civilizations

Mesopotamia is between Euphrates and Tigris rivers. The Sumerians lived there B.C. 4000-2234. They invent the cuneiform and they start to use numbers in B.C 2500. They used -60 based numbers. Lots of mathematical rule came from that base. Circles have 360 degree. A right triangle has 60 degree for each angle. At the following you can see some Sumerian numbers.