What is the formula for calculating the area of a circle?

The formula for calculating the area of a circle is indeed represented by πr², where "r" stands for the radius of the circle, which is the distance from the center of the circle to its edge. In this formula, π (pi) is a mathematical constant approximately equal to 3.14, and it represents the ratio of the circumference of a circle to its diameter. By squaring the radius and multiplying by π, you find the total space enclosed within the boundary of the circle.

The alternative choices involve different calculations: 2πr is used to find the circumference of the circle, bh represents the area of a rectangle (where "b" is the base and "h" is the height), and Length x Width also refers to the area of a rectangle. Therefore, these options do not pertain to the calculation of the area of a circle, affirming that πr² is the correct formula for this specific geometric shape.