List facts and responsibilities for the legislative , judicial, and executive branches:

Legislative Branch: Headed by Congress, which includes the House of Representatives and the Senate. The main task of these two bodies is to make the laws. Its powers include passing laws, originating spending bills (House), impeaching officials (Senate), and approving treaties (Senate). The Supreme Court's role is to interpret the Constitution and limit the powers of the other branches of government. The Supreme Court's power to do this is its power of judicial review, where it determines which laws and policies are constitutional, or allowable, and which are not. The executive branch of the U.S. government is responsible for enforcing laws; its power is vested in the President. The President acts as both the head of state and commander-in-chief of the armed forces. Independent federal agencies are tasked with enforcing the laws enacted by Congress.

Use the formula: (n-2)×180, where n is the number of sides(18-2)×180= 28800, now this is the full exterior angle of 18-gon so you divide it by 18.28800÷18=160