What are the three primary roof designs listed?

• A. Pitched, Flat, Arched
• B. Gabled, Hipped, Mansard
• C. Gabled, Flat, Sloped
• D. Arched, Domed, Vaulted

Answer: (A)

The main idea here is understanding the broad geometric categories roof designs fall into. Roofs are typically described by their overall shape and how they sit relative to the horizontal plane. The three broad designs listed are pitched (sloped), flat (nearly horizontal), and arched (curved). These capture the fundamental ways a roof can form its outer shape, which is why they’re the best trio to identify.

Pitched roofs are designed with a noticeable slope to shed water and snow, with many variations like gabled or hipped, but they all share that sloped characteristic. Flat roofs have little or no slope and rely on waterproofing and drainage systems to manage water. Arched roofs use a curved surface, which creates a different load path and aesthetic, and they stand apart from the flat and sloped categories.

The other options mix roof forms that are either specific types of pitched roofs (like gabled or mansard) or lump together sloped with flat or emphasize curved forms (like domed or vaulted). They don’t represent the three broad categories the question is aiming for.