Multiple choice

Area of a circle is ...................

  1. $\pi r^2$
  2. $2\pi r$
  3. $2\pi r^2$
  4. $4\pi r$
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A Correct answer
Explanation

The standard formula for the area of a circle is pi * r^2.

AI explanation

The area of a circle is defined by the standard geometric formula involving the mathematical constant pi and the square of the radius. By substituting r for the radius into this standard formula, the area is calculated as πr^2. This establishes the final mathematical relationship for the area enclosed by the circle.

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