# Radian

From Lazarus wiki

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Radian is the standard unit of angular measurement. A straight angle is Pi radians (1/4 cycles or turns). This means that 1 radian = 180/pi degrees. A full circle (One cycle or turn) has 2*Pi radians (360 degrees).

All angle parameters and results of trigonometric functions are in radians.

# See also

- CycleToRad Convert cycle angle to radians angle.
- DegToRad Convert degree angle to radians angle.
- GradToRad Convert grads angle to radians angle.
- RadToCycle Convert radians angle to cycle angle.
- RadToDeg Convert radians angle to degrees angle.
- RadtoGrad Convert radians angle to grads angle.