To calculate the entire surface area of the building, which includes the bottom of the building, it will require finding the area of rectangles, hexagons, and sphere, minus the area of a .

A sphere attached to a building covers part of one of the building’s flat surfaces. To find the building’s exposed surface area, subtract the circular area covered by the sphere from the areas of the rectangles and hexagons. Therefore, the missing shape is a circle.

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