In a circle, if the radius is 10 cm, what is the length of an arc that subtends

Practice Questions

Q1
In a circle, if the radius is 10 cm, what is the length of an arc that subtends an angle of 60 degrees at the center?
  1. 10.47 cm
  2. 6.28 cm
  3. 17.45 cm
  4. 5.24 cm

Questions & Step-by-Step Solutions

In a circle, if the radius is 10 cm, what is the length of an arc that subtends an angle of 60 degrees at the center?
  • Step 1: Identify the radius of the circle, which is given as 10 cm.
  • Step 2: Identify the angle subtended by the arc at the center, which is given as 60 degrees.
  • Step 3: Recall the formula for the length of an arc: L = (θ/360) * 2πr.
  • Step 4: Substitute the values into the formula: L = (60/360) * 2 * π * 10.
  • Step 5: Simplify the fraction 60/360 to 1/6.
  • Step 6: Calculate 2 * π * 10, which equals 20π.
  • Step 7: Multiply (1/6) by 20π to get (20π/6).
  • Step 8: Simplify (20π/6) to (10π/3).
  • Step 9: Use a calculator to find the approximate value of (10π/3), which is about 10.47 cm.
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