Which of the following is NOT a type of roof?

The pyramid roof style is indeed a type of roof characterized by its four triangular sides that converge at a single peak. It is often associated with structures that require a distinct visual element, enhancing aesthetic appeal and allowing for effective drainage of rain and snow.

On the other hand, hip, gambrel, and mansard roofs are well-documented roof designs in architecture. A hip roof has slopes on all four sides, a gambrel roof features two slopes on each side with the lower slope being steeper, and a mansard roof includes two slopes on each side like a gambrel but with a flat top. All these types serve various purposes in design and functionality, such as maximizing attic space or offering better stability against wind.

Therefore, the identification of the pyramid as not being a type of roof is incorrect, as it is indeed a recognized roof style within architectural design.