What is the area of a sector of a circle with a radius of 10 cm and an angle of

Practice Questions

Q1
What is the area of a sector of a circle with a radius of 10 cm and an angle of 60 degrees? (Use π = 3.14)
  1. 17.5 cm²
  2. 15.7 cm²
  3. 20.9 cm²
  4. 25.0 cm²

Questions & Step-by-Step Solutions

What is the area of a sector of a circle with a radius of 10 cm and an angle of 60 degrees? (Use π = 3.14)
Correct Answer: 17.5 cm²
  • Step 1: Identify the formula for the area of a sector of a circle, which is Area = (θ/360) × π × r².
  • Step 2: Substitute the values into the formula. Here, θ (the angle) is 60 degrees and r (the radius) is 10 cm.
  • Step 3: Calculate (60/360). This simplifies to 1/6.
  • Step 4: Calculate (10 cm)², which is 100 cm².
  • Step 5: Now substitute these values into the formula: Area = (1/6) × 3.14 × 100 cm².
  • Step 6: Multiply 3.14 by 100 cm² to get 314 cm².
  • Step 7: Now divide 314 cm² by 6 to find the area of the sector.
  • Step 8: The result of 314 cm² divided by 6 is approximately 52.33 cm².
  • Step 9: Therefore, the area of the sector is approximately 52.33 cm².
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