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Hace 8 horas · The number π (/ p aɪ /; spelled out as "pi") is a mathematical constant that is the ratio of a circle's circumference to its diameter, approximately equal to 3.14159.The number π appears in many formulae across mathematics and physics.It is an irrational number, meaning that it cannot be expressed exactly as a ratio of two integers, although fractions such as are commonly used to ...
Hace 1 día · Cold War 12 March 1947 – 26 December 1991 (44 years and 9 months) Part of the post-World War II era NATO and Warsaw Pact states during the Cold War era The "Three Worlds" of the Cold War era, between 30 April and 24 June 1975: First World: Western Bloc led by the United States and its allies Second World: Eastern Bloc led by the Soviet Union, China (independent), and their allies Third World ...
