# trig

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If an angle is 1 radian, what is the arc length in radians?

• trig -

arc length is not measured in "radians", but rather in linear units

if the angle is 1 radian, then the arclength supported by that 1 radian is 1 radius..

arclength = (radius)*(angle in radians)

BTW, that is the definition of 1 radian angle, the central angle of a sector with radius r and arclength of r.

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