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The truncated icosahedron is an Archimedean solid, meaning it is a highly symmetric and semi-regular polyhedron, and two or more different regular polygonal faces meet in a vertex. [5] It has the same symmetry as the regular icosahedron, the icosahedral symmetry, and it also has the property of vertex-transitivity. [6][7] The polygonal faces ...
A bracket or tournament bracket is a tree diagram that represents the series of games played during a knockout tournament. Different knockout tournament formats have different brackets; the simplest and most common is that of the single-elimination tournament. The name "bracket" is American English, derived from the resemblance of the links in ...
Round Robin Schedule Span Diagram. Both the graph and the schedule were reported by Édouard Lucas in [20] as a recreational mathematics puzzle. Lucas, who describes the method as simple and ingenious, attributes the solution to Felix Walecki, a teacher at Lycée Condorcet. Lucas also included an alternative solution by means of a sliding puzzle.
A football pitch (also known as a soccer field in the United States) [1] is the playing surface for the game of association football. Its dimensions and markings are defined by Law 1 of the Laws of the Game, "The Field of Play". [2] The pitch is typically made of natural turf or artificial turf, although amateur and recreational teams often ...
The nautical mile (nmi) was originally defined as the arc length of a minute of latitude on a spherical Earth, so the actual Earth's circumference is very near 21 600 nmi. A minute of arc is π 10 800 of a radian. A second of arc, arcsecond (arcsec), or arc second, denoted by the symbol ″, [2] is 1 60 of an arcminute, 1 3600 ...
Three-sided football. Diagram of a three sided football pitch. The penalty areas can also be square or trapeziums. Three-sided football (often referred to as 3SF) is a variation of association football played with three teams instead of the usual two. Played on a hexagonal pitch, [1] the game can be adapted to other versions of football.
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Major League Baseball (MLB) has used a best-of-seven format for the League Championship Series since 1985, and for the World Series between 1905 and 1918, and since 1922. [f] MLB uses the "2–3–2" format. The National Basketball Association (NBA) uses a "2–2–1–1–1" format for all playoff rounds including the Finals.