Surface area of something flat

To calculate the surface area of something flat, you would typically need to measure its length and width. The formula for finding the surface area of a flat object, such as a rectangle or square, is:

Surface Area = 2 (length x width)

For example, if you have a rectangular piece of paper that is 5 inches long and 3 inches wide, the surface area would be:

Surface Area = 2 (5 x 3)
Surface Area = 2 (15)
Surface Area = 30 square inches

So, the surface area of the piece of paper would be 30 square inches.