help asap pleasee, I'LL GIVE BRAINLIEST FOR THIS QUESTION

an explanation would be appreciated, thank you in advance! <33

the radian measure of the central angle which subtends an arc of length 2π cm. In a circle of diameter = 2π cm. equals = ...........

a) 1
b) 2
c) π
d) 2π

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help asap pleasee ILL GIVE BRAINLIEST FOR THIS QUESTIONan explanation would be appreciated thank you in advance lt33the radian measure of the central angle whic class=