Angle to Radian
Angle to Angle

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

分類: En

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