How many square feet are in an acre?

An acre is a unit of area commonly used in real estate and land measurement, particularly in the United States. To understand why the correct answer is 43,560 square feet, it's important to know the definition and conversion involving acres.

An acre is defined as 1/640th of a square mile. Since a square mile contains 27,878,400 square feet, calculating 1/640 of that gives you 43,560 square feet. This value is standardized and widely accepted in measurements related to property and land, making it a critical figure for anyone involved in real estate.

The other provided choices do not align with the accepted measurement for an acre. For instance, 1,000 square feet is far less than an acre, and 32,670 square feet and 50,000 square feet do not accurately reflect the proper calculation either. Understanding the dimensions and conversions associated with land measurement is essential for anyone in the real estate field.