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
Secretariat of the Interior Secretariat of the Interior The Mexican Office for Domestic Affairs (, "SEGOB", literally "Office for Governance") is the public ministry concerned with the country's domestic affairs, the presenting of the president's bills to Congress, their publication and certain issues of national security. The country's principal intelligence agency, CISEN, is directly answerable to the Secretary of the Interior. The Secretary is a member of the President's Cabinet and is, given the constitutional implications of the post, the most important Cabinet Member. The Office is practically equivalent to Ministries of the Interior in most other countries (with the exception of the United