# algebra

posted by .

s(arc length = meters

s denotes the lenght of the arc of a circle of radius r subtended by the central angle 0. Find the missing quantity.
The radius r of the circle is ? feet

• algebra & geometry -

The length of an arc equals the radius times the angle in radians.
That is because the number of radians in a circle is defined to be 2 pi.

54 x (1/9) = 6

Your second question is incomplete. You need to know the central angle and arc length to compute the radius. I assume that your 0 is supposed to be Greek theta, not zero.

• algebra -

Thanks and yes it's suppose to be a Greek theta.

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