http://en.wikipedia.org/wiki/The_Pentagon
that has a link to wikipedia.org, it says it was dedicatede in July of '34 i think, and it was created during the earlier years of WWII i hope i helped.
Answeroh here's another little fact.http://www.rotten.com/library/culture/pentagon/ says that "Construction of the Pentagon began on, and you'll love this, September 11, 1941, exactly 60 years to the day before you-know-what. Tell me that's not a conspiracy of some sort!"1/15/1943
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2001
2001.
It was named after a pentagon, it wasn't the 'Pentagon' that named the 'pentagon'.
It was hit in the terror attack of 9/11/2001.
September 11th, 2001.
Hexagon * * * * * A pentagon
pentagon A pentagon. A 5-sided figure is called a pentagon. pentagon A five sided figure is called a 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.
2001
Pentagon ("pent" means five).