A circle is a simple shape of Euclidean geometry that is the set of all points in a plane that are a given distance from a given point, the centre. The distance between any of the points and the centre is called the radius. It can also be defined as the locus of a point equidistant from a fixed point.
A circle is a simple closed curve which divides the plane into two regions: an interior and an exterior. In everyday use, the term "circle" may be used interchangeably to refer to either the boundary of the figure, or to the whole figure including its interior; in strict technical usage, the circle is the former and the latter is called a disk.
A circle can be defined as the curve traced out by a point that moves so that its distance from a given point is constant.
A circle may also be defined as a special ellipse in which the two foci are coincident and the eccentricity is 0. Circles are conic sections attained when a right circular cone is intersected by a plane perpendicular to the axis of the cone.
The word "circle" derives from the Greek, kirkos "a circle," from the base ker- which means to turn or bend. The origins of the words "circus" and "circuit" are closely related.
The Pinakothek der Moderne (= "(Art) Gallery of the Modern"; from Greek: "pinax" = "board", "tablet") is a modern art museum, situated in the city centre of Munich, Germany. Together with its two predecessors Alte Pinakothek and Neue Pinakothek (therefore locally also referred to as "Dritte" - e.g. "Third" - Pinakothek), as well as the Museum Brandhorst, the Antikensammlungen (= "Collections of Antiques"), the Glyptothek, the Städtische Galerie im Lenbachhaus and the new joint building of the Ägyptisches Museum and the Hochschule für Fernsehen und Film, currently both scheduled to open in 2012, it is part of Munich's "Kunstareal" (the "art district").