{{Infobox polygon | name = Square | image = Square (geometry).svg | caption = A square is a regular quadrilateral. | type = Regular polygon | euler = | edges = 4 | schläfli = {4} | wythoff = | coxeter = | symmetry = Dihedral (D4) | area = t2 (with t = edge length) | angle = 90° | dual = dual polygon of this shape | properties = convex, cyclic, equilateral, isogonal, isotoxal}} In geometry, a square is a regular quadrilateral. This means that it has four equal sides and four equal angles (90-degree angles, or right angles). It can a...

In geometry, a cuboid is a solid figure bounded by six faces, forming a convex polyhedron. There are two competing (but incompatible) definitions of a cuboid in mathematical literature. In the more general definition of a cuboid, the only additional requirement is that these six faces each be a quadrilateral, and that the undirected graph formed by the vertices and edges of the polyhedron should be isomorphic to the graph of a cube. Alternatively, the word “cuboid” is sometimes used to refer to a shape of this type in which each of the faces is a rectangle (and so each pair of adjacent fac...

Smash TV is a 1990 arcade game created by Eugene Jarvis and Mark Turmell for Williams. Home versions were developed for various platforms and most were published by Acclaim Entertainment. Description The play mechanic is very similar to that of Eugene Jarvis' earlier ', with dual-joystick controls and series of single screen areas. The theme of the game, borrowed from The Running Man, [http://www.gamespot.com/xbox360/action/smashtv/review.html Smash TV Review] involves players competing in a violent game show, set in the then future year of 1999. Moving from one room to the next with...

L’Organisation du traité de l’Atlantique Nord (Otan ou OTAN ; en anglais : North Atlantic Treaty Organization ou NATO) est une organisation politico-militaire qui rassemble de nombreux pays occidentaux, dans le but premier d'assurer leur défense commune contre les menaces extérieures ainsi que la stabilité du continent européen. Son siège, initialement situé à Londres puis à Paris, se trouve depuis 1966 à Bruxelles, et son commandement militaire (SHAPE), initialement à Rocquencourt (France), se trouve aujourd'hui à Mons (Belgique). L'Otan est née le suite à des négociations lancées pa...