Victims of Terrorist Attack on the Pentagon Memorial excluded from the burial so that there was no possibility that any terrorist remains were included. These terrorist and commingled remains were turned over to the Federal Bureau of Investigation (FBI) in February 2002. The FBI said the remains were "disposed of in a dignified manner'", although a very small amount of suspected terrorist remains were retained to aid in later criminal prosecutions. The Victims of Terrorist Attack on the Pentagon Memorial was dedicated on September 12, 2002. A funeral service for the 30 victims was held at the Arlington Memorial Amphitheater, the first time the amphitheater had held such
Heptagon at the center and at the heptagon's vertices, and then halving each triangle using the apothem as the common side. The apothem is half the cotangent of formula_2 and the area of each of the 14 small triangles is one-fourth of the apothem. The exact algebraic expression, starting from the cubic polynomial (one of whose roots is formula_3) is given in complex numbers by: in which the imaginary parts offset each other leaving a real-valued expression. This expression cannot be algebraically rewritten without complex components, since the indicated cubic function is "casus irreducibilis". The area of a regular heptagon inscribed