raidans is just another way of expressing the size of an angle. pi radians = 180 degrees.
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Meter is a unit of length. Radian is a unit of angle. They don't relate.
2.094
An informal definition: If you take a radius of a circle and wrap it around its circumference then the angle which that arc will make at the centre of the circle is 1 radian.More formally, a radian is 1/(2*pi) of a whole angle.
degree and radian are juest unit measurment of angle
In any and all circles, the ratio of the circumference to the diameter is a constant called 'pi' ~ 3.14159 and since a full circle contains 2 pi radians = a constant 360 degrees, then the radian itself is a constant angle ~ 180/3.14159 = 57.3'.