The square footage of a house is 1200 square feet. what type of data is this?

The answer for the question shown above is: The square footage of a house that is 1200 square feet is the "Area".

 The explanation is shown above:

 1- By definition, the area is the measure of a two-dimensional surface.Its units can be written in m^2, ft^2, in^2...However, in the International System of Units is m^2. 

 2. This is very useful when you want to know the surface of a house. If it is a rectangular house, you can calculate the area as below:

 A=LxW

 Where L is the length and W is the width