The Pentagon is the HQ for the U.S.A.'s defence.
The Pentagon.
Each corner of the Pentagon building is 108 degrees (assuming that the building is indeed a perfect equalateral pentagon).
They are both the same. Pentagon is just a shorter way of saying the pentagon building. As for if you meant the shape pentagon, it is called the pentagon because it's shape is a pentagon.
Yes, the Pentagon.
If viewed from the air, the shape of the building is a pentagon (it has 5 sides)
Yes. The building is called "The Pentagon". http://en.wikipedia.org/wiki/The_Pentagon
The US "Pentagon" building is an example of their use.
When it is a building otherwise a 5 sided polygon is a pentagon
The building that's shaped like a pentagon.
The Pentagon building in Washington, DC. ;)These are right
Yes
the pentagon