# Definition:Angle/Unit/Degree/Historical Note

The division of the circle into $360$ degrees originates from the Babylonians, who used a sexagesimal (base $60$) number system for the purposes of mathematics and astronomy.
Conveniently, the most commonly used angles in geometry (for example $30 \degrees$, $45 \degrees$, $60 \degrees$) are all whole numbers when measured in degrees.