The Method of Mechanical Theorems convenient to use a little bit of coordinate geometry. If a sphere of radius 1 is placed with its center at "x" = 1, the vertical cross sectional radius formula_2 at any "x" between 0 and 2 is given by the following formula: The mass of this cross section, for purposes of balancing on a lever, is proportional to the area: Archimedes then considered rotating the triangular region between "y" = 0 and "y" = "x" and "x" = "2" on the "x"-"y" plane around the "x"-axis, to form a cone. The cross section of this cone is a circle
The X-Files Region 2, such as "Deadalive", "Existence", "Nothing Important Happened Today", "Providence" and "The Truth". Various other episodes were released on DVD and VHS. In 2005, four DVD sets were released containing the main story arc episodes of "The X-Files". The four being "Volume 1 Abduction", "Volume 2 Black Oil", "Volume 3 Colonization" and "Volume 4 Super Soldiers". A boxed set containing all nine seasons and the first film was made available in 2007, which contains all of the special features from the initial releases. The set also includes an additional disc of new bonus features and various collectibles, including a