Equilateral pentagon of δ can be seen from the figure: Simplifying, δ is obtained as function of α and β: The remaining angles of the pentagon can be found geometrically: The remaining angles of the orange and blue triangles are readily found by noting that two angles of an isosceles triangle are equal while all three angles sum to 180°. Then formula_7 and the two remaining angles of the green triangle can be found from four equations stating that the sum of the angles of the pentagon is 540°, the sum of the angles of the green triangle is 180°, the angle
Victims of Terrorist Attack on the Pentagon Memorial memorial himself. He drew inspiration from the memorial to the 253 dead of the United States Coast Guard ship USS "Serpens", which is located in the northern corner of Section 34 at Arlington National Cemetery. The "Serpens" memorial is octagonal in shape and lists the names of the dead on its side panels. The Victims of Terrorist Attack on the Pentagon Memorial is a pentagonal granite marker high. On five sides of the memorial along the top are inscribed the words "Victims of Terrorist Attack on the Pentagon September 11, 2001". Aluminum plaques, painted black, are inscribed with the names