Thatâs capital delta (lower case is Î´), a letter of the Greek alphabet. It can be used in equations just like normal letters in a similar manner to x. It is usually used to represent: a difference. an angle.
Roosevelt also sought to convince the public that an international organization was the best means to prevent future wars. The Senate approved the UN Charter on July 28, 1945, by a vote of 89 to 2. The United Nations came into existence on October 24, 1945, after 29 nations had ratified the Charter.
1 The United Nation Countries The United Nation (UN) was formed on October 24, 1945. 2  Franklin D. Roosevelt first used the term during the Second World War, when 26 countries agreed to come together to figâ¦.