What is the area of a sector of a circle with a radius of 4 cm and an angle of 9

Practice Questions

Q1
What is the area of a sector of a circle with a radius of 4 cm and an angle of 90 degrees? (2023)
  1. 4π cm²
  2. 2π cm²
  3. 8π cm²
  4. 6π cm²

Questions & Step-by-Step Solutions

What is the area of a sector of a circle with a radius of 4 cm and an angle of 90 degrees? (2023)
  • Step 1: Identify the formula for the area of a sector of a circle, which is Area = (θ/360) × πr².
  • Step 2: Substitute the values into the formula. Here, θ (the angle) is 90 degrees and r (the radius) is 4 cm.
  • Step 3: Calculate the area by plugging in the values: Area = (90/360) × π(4)².
  • Step 4: Simplify the fraction 90/360 to get 1/4.
  • Step 5: Calculate (4)², which is 16.
  • Step 6: Now multiply: Area = (1/4) × π × 16.
  • Step 7: Simplify the multiplication: Area = 4π cm².
  • Step 8: Therefore, the area of the sector is 4π cm².
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