Represents an angle value.
| Angle | Creates an Angle from a float and an optionnal AngleUnit. | 
| ToDegrees | Returns the value of the angle, expressed in degrees. | 
| ToGradians | Returns the value of the angle, expressed in gradians. | 
| ToRadians | Returns the value of the angle, expressed in radians. | 
| ToTurns | Returns the value of the angle, expressed in turns. |