Calculated automatically
Radians to Degrees Converter
Degrees to Radians Converter
Noun description
“Radian” is the “length of the arc” to express the “magnitude of the angle”.
Let ∠AOB be the central angle of the unit circle, and the length of the corresponding arc AB is θ.
∠AOB = θ radians
When arc AB has length equal to radius 1, ∠AOB = 1 radian.
The arc length of a semicircle is π, and the corresponding central angle is π radians, that is, 180°= π radians.
Formula description
1 radian = 180°/π = 57.2958
1° = π/180 radians = 0.01745 radians
