Using integration, the area of the circle x² + y² = 9 is:
Using integration, the area of the circle x² + y² = 9 is:
- A. 9π sq units
- B. 3π sq units
- C. 6π sq units
- D. 18π sq units
Answer: A) 9π sq units
Explanation: Area = 4 × ∫[0 to 3] √(9 − x²) dx = 4 × (π×9/4) = 9π sq units.
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