In mathematics, a plane is a flat, twa-dimensional surface. A plane is the twa dimensional analogue of a pynt (zero-dimensions), a line (ane-dimension) an a solid (three-dimensions). Planes can arise as subspaces o some heicher dimensional space, as wi the walls o a room, or they mey enjoy an independent existence in thair ain richt, as in the settin o Euclidean geometry.
When wirkin exclusively in twa-dimensional Euclidean space, the definite airticle is uised, so, the plane refers tae the whole space. Mony fundamental tasks in mathematics, geometry, trigonometry, graph theory an graphin are performed in a twa-dimensional space, or in ither wirds, in the plane.