Chat with our AI personalities
The radian measure IS the arc length of the unit circle, by definition - that is how the radian is defined in the first place.
It is NOT a national unit but an international one.
Because a radian is a far more versatile unit of measurement, especially in advanced mathematics.
it is used as an degree. It is an unit of angle.
It is the derived unit of plane angle and 1 radian = one full rotation/2π. Also, it is equal to 57.296°.