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
Ministry of the Interior (Italy) 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 to the Standing Committee of Interior Ministers and also drafts all passport, identity card, firearms, and explosives legislation. The Ministry of the Interior is political authority for the administration