What is the length of an arc of a circle with a radius of 5 cm that subtends an

Practice Questions

Q1
What is the length of an arc of a circle with a radius of 5 cm that subtends an angle of 60 degrees at the center?
  1. 5.24 cm
  2. 3.14 cm
  3. 5.00 cm
  4. 10.47 cm

Questions & Step-by-Step Solutions

What is the length of an arc of a circle with a radius of 5 cm that subtends an angle of 60 degrees at the center?
  • Step 1: Identify the radius of the circle. In this case, the radius (r) is 5 cm.
  • Step 2: Identify the angle subtended at the center of the circle. Here, the angle (θ) is 60 degrees.
  • Step 3: Use the formula for the length of an arc, which is L = (θ/360) * 2πr.
  • Step 4: Substitute the values into the formula. So, L = (60/360) * 2π(5).
  • Step 5: Simplify the fraction 60/360 to 1/6.
  • Step 6: Calculate 2π(5) which equals 10π.
  • Step 7: Now, multiply (1/6) by 10π to get L = (1/6) * 10π.
  • Step 8: This simplifies to L = 10π/6, which can be further simplified to 5π/3.
  • Step 9: To find a numerical approximation, calculate 5π/3, which is approximately 5.24 cm.
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