Circle of 360 degrees

There are 360degrees in a circle because in 3000 BC, sumerians invented the writting. But hey were having calendars in the 2400 BC, in that hey divided year into 12 months and each month had 30days, that is total 360 days. These peoples saw sun moon and other planets revolving around the sun. Instead of understanding whay they revolve they divide a circle into 360 degrees. That is reason there are 360degrees in a circle.