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.
The Charter was signed by fifty nations on 26 June 1945 and became the foundational document of the UN. After countries, including the United States, Soviet Union, United Kingdom, China and France, ratified the Charter, the UN officially came into existence on 24 October 1945.