ANSWER
General Brehon B. Somervell, George Edwin Bergstrom, and Lieutenant Colonel Hugh J. Casey.
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The Pentagon was designed by American architect George Bergstrom (1876-1955). David J. Witmer replaced Bergstrom as chief architect in April 1942.
It was actually built by general contractor John McShain of Philadelphia. The designer was George Bergstrom.
A pentagon is a five-sided figure, typically found in geometry. The Pentagon in Washington D.C. is five sided and named after the polygon. A pentagon is a thing, so it would be a noun. Some examples of sentences where the word pentagon functions as a noun are: "A pentagon has five sides." (subject) "That shape is a pentagon." (Predicate Nominative; a nominative is a fancy word for noun) Hope that helps!
1400 Defense Pentagon, Washington DC, 20301-1400
The Pentagon has the geometric shape of a pentagon (It is a polygon with five interior angles and five equal sides).
None. A pentagon is a plane shape whose boundaries consist of five straight lines. There are, therefore, no rings.
To get to work in the Pentagon, you can join one of the US defense organizations like the Army, Navy, Air Force or Marines, or you can get a job with a civilian organization that provides services to the Department of Defense. Then you get assigned to a job that must be performed in the Pentagon.