Answer :
Final answer:
Federal highway signs typically have a rectangular shape, which is used to convey important information such as speed limits and directions along highways.
Explanation:
The shape of federal highway signs or state highway signs is typically rectangular. These signs are designed to convey a variety of information including speed limits, exit names, mile markers, and directional guidance among others. The shape mentioned in this context refers to the general outline that borders the sign itself. While different types of signs have various shapes, such as octagonal for stop signs, general highway signs that provide information and directions are mostly rectangular. It's helpful to know these shapes as they can offer important visual cues about the function of the sign while driving.
