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Trigonometry

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Moderate

Finding Central Angle (Radians)

TRIG-G412WG

A circle has a radius of $2$ meters. There is an arc with a length of $4$ meters somewhere on the circle. Determine the measure of the central angle for that arc in radians.

A

$2$

B

$\cfrac {1}{2}$

C

$\cfrac{4{\pi}}{3}$

D

$114.6$

E

$4{\pi}$