Question

A dome is generated by rotating ________ 360 degrees about a vertical central axis.

Answer 1

I believe the correct answer an arch.

 

The resulting architectural form of dome, a rounded vault forming the roof of a building or structure, is generated by rotating an arch 360 degrees about a vertical central axis. Dome, in the modern world, is usually found over religious buildings, legislative chambers, sports stadiums, and a variety of functional structures.