A sector of a circle has radius 12 cm and angle . Find the arc length, in terms of .

Answer and explanation

Correct answer: D. cm

  1. Step 1: Fraction of the circle: .
  2. Step 2: Circumference: .
  3. Step 3: Arc length: cm.
Answer
cm.
Why not the others: cm: this is the area of the sector, . cm: the fraction of the circle was doubled. cm: this is the whole circumference.

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