What formula is used to find the area of a rectangle?

The area of a rectangle is determined using the formula A = lw, where A represents the area, l is the length, and w is the width of the rectangle. This formula is derived from the concept that area is measured in square units, which are calculated by multiplying the base (length) of the rectangle by its height (width).

For a rectangle, the length and width are the two perpendicular sides, and when you multiply these two dimensions together, you get the total space contained within the rectangle. This straightforward calculation allows for a clear understanding of the space covered by the rectangle.

In contrast, other formulations provided do not correctly represent the area of a rectangle. For instance, adding length and width or using them in an equation involving multiplication with a factor other than one does not yield an accurate representation of area but instead results in different calculations such as perimeter or other geometric properties. Thus, the formula for the area being A = lw is essential for determining how much space is enclosed within the boundaries of a rectangle.