What is a shape area enclosed by an outline?

The area enclosed by an outline refers to the two-dimensional space contained within a closed geometric shape, such as a circle, square, or triangle. This area can be calculated using various mathematical formulas depending on the shape. For example, the area of a rectangle is found by multiplying its length by its width, while the area of a circle is calculated using the formula (A = \pi r^2), where (r) is the radius. Essentially, it represents the total space within the boundaries defined by the outline.