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What is the length of an arc of a circle with a radius of 7 cm and a central ang

Practice Questions

Q1
What is the length of an arc of a circle with a radius of 7 cm and a central angle of 60 degrees? (2023)
  1. 7π/3 cm
  2. 14π/3 cm
  3. 14 cm
  4. 21 cm

Questions & Step-by-Step Solutions

What is the length of an arc of a circle with a radius of 7 cm and a central angle of 60 degrees? (2023)
  • Step 1: Identify the radius of the circle, which is given as 7 cm.
  • Step 2: Identify the central angle in degrees, which is given as 60 degrees.
  • Step 3: Use the formula for arc length: Arc length = (θ/360) × 2πr.
  • Step 4: Substitute the values into the formula: Arc length = (60/360) × 2π(7).
  • Step 5: Simplify the fraction 60/360 to 1/6.
  • Step 6: Calculate 2π(7) to get 14π.
  • Step 7: Multiply (1/6) by 14π to get (14π/6).
  • Step 8: Simplify (14π/6) to (7π/3).
  • Step 9: The final answer for the arc length is 7π/3 cm.
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