In the circle with center , central angle intercepts an arc . If the radius of the circle is , what is the length of arc ?

Answer and explanation

Correct answer: B.

  1. Step 1: Arc length formula is .
  2. Step 2: Substitute and : .
Answer
2\pi\text{ cm}.
Why not the others: '' divides by 2; '' forgets the factor of 2 in circumference; '' divides by 12.

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