One revolution = tau radians (or 2*pi radians).
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One radian is about 57.3 degrees
One degee = (pi/180)*radian
Meter is a unit of length. Radian is a unit of angle. They don't relate.
One radian = 180/pi or about 57.3 degrees (pi = about 3.14).
One radian is equal to roughly 57 degrees!