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
Ministry of the Interior (Italy) stucco decoration. In 1961, the headquarters of the Office of Prime Minister was separated from the Ministry of the Interior and transferred to Palazzo Chigi, where it remains today. Ministry of the Interior (Italy) The Ministry of the Interior () is a government agency of Italy, headquartered in Rome. It is cabinet-level ministry of the Italian Republic. As of 1 June 2018, Matteo Salvini is the minister. The Ministry of the Interior is responsible for internal security and the protection of the constitutional order, for civil protection against disasters and terrorism, for displaced persons and administrative questions. It is host