A circle has a radius of 5 cm. What is the length of an arc that subtends an ang

Practice Questions

Q1
A circle has a radius of 5 cm. What is the length of an arc that subtends an angle of 60 degrees? (2023)
  1. 5.24 cm
  2. 3.14 cm
  3. 5.00 cm
  4. 10.47 cm

Questions & Step-by-Step Solutions

A circle has a radius of 5 cm. What is the length of an arc that subtends an angle of 60 degrees? (2023)
  • Step 1: Understand that the arc length formula is Arc length = (θ/360) × 2πr, where θ is the angle in degrees and r is the radius.
  • Step 2: Identify the values given in the problem. The radius (r) is 5 cm and the angle (θ) is 60 degrees.
  • Step 3: Substitute the values into the formula: Arc length = (60/360) × 2π × 5.
  • Step 4: Simplify the fraction 60/360 to 1/6.
  • Step 5: Calculate 2π × 5, which equals 10π.
  • Step 6: Now multiply (1/6) by 10π: Arc length = (1/6) × 10π.
  • Step 7: Calculate the arc length: Arc length ≈ (1/6) × 31.42 (using π ≈ 3.14) ≈ 5.24 cm.
  • Arc Length Calculation – The formula for calculating the length of an arc based on the radius and the angle in degrees.
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