180
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A radian is 180/pi degrees, or about 57 degrees
180 degrees divided by pi, or roughly 57.3 degrees.
Pi is the ratio of a circle's circumference to its diameter, about 3.14159. Pi radians is equal to 180 degrees.
A radian is exactly 180 / pi degrees, approximately 57.30 degrees.
1 degree = pi*radian/180 So therefore 15 times pi*radian/180 = pi*radian/12