Why is there 360 degrees in a circle?

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Student: Why is there 360 degrees in a circle?

Teacher:
A degree is a fraction of a circle, and there are 360 degrees in each of the imaginary circles that describe the surface of the earth.
The number 360 is attributed to the Babylonians, who devised a base 60 number system. Our modern system is base 10. They probably were the first to divide a circle into 360 degrees. Some historians think that the base 60 system derives from the approximate length in days of a calendar year. But others claim that the Babylonians chose 60 because it is divisible by so many other numbers. Hipparchus, who invented the formal system of latitudes and longitudes, divided each circle into 360 degrees, each degree having 60 minutes and each minute having 60 seconds.

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