SOLUTION: Give the radian measure of the central angle of a unit circle and subtended by an arc of measure 1/2. Please and Thank you.

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Question 1038803: Give the radian measure of the central angle of a unit circle and subtended by an arc of measure 1/2. Please and Thank you.
Found 2 solutions by Fombitz, ikleyn:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
S=R%2Ftheta
Substituting,
1%2F2=1%2Ftheta
theta=2rad

Answer by ikleyn(52786) About Me  (Show Source):
You can put this solution on YOUR website!
.
Give the radian measure of the central angle of a unit circle and subtended by an arc of measure 1/2. Please and Thank you.
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I am here to fix an error of the previous solution. 

S = R%2Atheta   (where S is the length of an arc)

Substituting,

1%2F2 = 1%2Atheta

theta = 1%2F2 rad

Notice to the sender: In this context it would be better to formulate the problem like this:

Give the radian measure of the central angle of a unit circle highlight%28cross%28and%29%29 subtended by an arc of highlight%28cross%28measure%29%29 the length 1/2.