Which of the following is determined by measuring the exterior dimensions of a home including garages, patios, and entryways?

The correct answer is based on the definition of square footage under roof, which encompasses all the exterior dimensions of a home, including areas such as garages, patios, and entryways. This measurement provides a comprehensive view of the total area that is covered by the roof of the structure.

In contrast, the square footage of living area typically refers to the space that is exclusively intended for living purposes and does not include areas like garages and patios. Front footage area relates specifically to the measurement of the width of a property along the front boundary line and is not a direct measure of the building's total size. Heated and cooled areas focus exclusively on the spaces that are climate-controlled, again excluding non-living spaces like garages or patios.

Thus, square footage under roof represents the most inclusive term for assessing the overall dimensions of a home, which is why it is the correct choice for the given question.