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The chord ST of a circle is equal to the radius, \(r\) of the circle. Find the length ...

The chord ST of a circle is equal to the radius, \(r\) of the circle. Find the length of \(\operatorname{arcST}\)
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  • A \(\pi / 2\)
  • B \(\pi r / 3\)
  • C \(\pi r / 3\)
  • D \(\pi r / 12\)
Correct Answer: Option B
Explanation:

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