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    Re: why 360 ?
    From: Eric Haberfellner
    Date: 2001 Dec 01, 6:17 PM

    It was during the reign of Nebuchadnezzar (605-562 BC) in the Chaldean
    dynasty in Babylon that the circle was divided into 360 degrees. This was
    because the Chaldeans had calculated by observation and inference that a
    complete year numbered 360 days. The basis of angular measure for the
    mathematicians of Babylon was the angle at each of the corners of an
    equilateral triangle. They did not have decimal fractions and thus found it
    difficult to deal with remainders when doing division. So they agreed to
    divide the corner of an equilateral triangle into 60 degrees, because 60
    could be divided by 2, 3, 4, 5 and 6 without remainder. Each degree was
    divided into 60 minutes and each minute into 60 seconds. If the angles at
    the corners of six equilateral triangles are placed together they form the
    angle formed by a complete circle (see diagram). It is for this reason that
    there are six times 60 degrees of arc in the complete circle.
    I found this information at the following website:
    -----Original Message-----
    From  Navigation Mailing List
    [mailto:NAVIGATION-L@LISTSERV.WEBKAHUNA.COM]On Behalf Of Yourname Here
    Sent: Saturday, December 01, 2001 7:19 PM
    Subject: why 360 ?
    Why does a circle have 360 degrees ?

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