What is the formula for calculating the square footage of a circle?

The formula for calculating the area of a circle is based on the relationship between its radius and the mathematical constant pi (π). This area is determined by multiplying π by the radius squared. The correct formula, thus, is expressed as π times the radius squared.

Using the radius is essential because it is the distance from the center of the circle to its outer edge, which is directly related to the size of the circle. The diameter, on the other hand, is twice the length of the radius and is not used directly in the area calculation in its standard form.

Similarly, multiplying the diameter directly does not yield the area; instead, it disregards the squared component associated with the radius. The relevance of height is also misplaced as it pertains to volume calculations for three-dimensional shapes rather than area measurements for circles. Hence, the correct formula involves π and the radius squared, succinctly defining the area of a circle.