Pentagon Pentagon In geometry, a pentagon (from the Greek πέντε "pente" and γωνία "gonia", meaning "five" and "angle") is any five-sided polygon or 5-gon. The sum of the internal angles in a simple pentagon is 540°. A pentagon may be simple or self-intersecting. A self-intersecting "regular pentagon" (or "star pentagon") is called a pentagram. A "regular pentagon" has Schläfli symbol {5} and interior angles are 108°. A "regular pentagon" has five lines of reflectional symmetry, and rotational symmetry of order 5 (through 72°, 144°, 216° and 288°). The diagonals of a convex regular pentagon are in the golden ratio to its
Victims of Terrorist Attack on the Pentagon Memorial Arlington County Police Department, cemetery security, Fort Myer security, and other federal agencies converged on the scene. Cemetery officials said there were no eyewitnesses to the suicide, but were unable to ascertain if he was a veteran. Victims of Terrorist Attack on the Pentagon Memorial The Victims of Terrorist Attack on the Pentagon Memorial is a memorial over a group burial site at Arlington National Cemetery in the United States. It commemorates the victims of the Pentagon, which was struck by al-Qaeda terrorists as part of the September 11 attacks. The memorial specifically honors the five individuals for whom no