quiz: why is the Pentagon in the shape of a pentagon?

[calimac]

1. Because it would be silly to call a building "The Pentagon" if it wasn't shaped like a pentagon.
   
2. To signify the five branches of the military: Army, Navy, Air Force, Marines, Coast Guard.
   
3. To evoke the shape of 15th-century fortifications.
   
4. To confuse any potential assailants, like the ones on 9/11, as to which face of the building to attack.
   
5. To best fit in the space they decided to build it in.
   
6. To fit in the space they were originally going to build it in, but they moved the site and decided to leave it as a pentagon because it looked cool.