
A radian is a unit of measure for rotation around a point. 2π radians is the same rotation as one complete rotation about a circle. The abbreviation for radians is rad. Common angles in radians and degrees
How to convert radians to degreesOne complete rotation about a circle is 2π rad. or 360°. This means 2π rad. = 360°. So, the conversion factor is . Example: Convert radians to degrees. How to convert degrees to radiansThe conversion factor for degrees to radians is . Example: Convert 45° to radians. . 
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