The Babylonians divided the circle into 360º because it aligned with their lunar calendar, which had 12 months of 30 days each. 巴比伦人将圆分为 360º，因为这与他们的农历一致，农历有 12 个月，每个月 30 天。
360 is also a highly composite number with many divisors, making it easy subdivide the circle into smaller parts.
360 也是一个有许多因数的合数，因此很容易将圆再分成更小的部分。