Surface

One Surface or also Cross section or cross-section area is:

  1. a range expanded flat after length and width.
    a surface is in two Dimensions expanded part of one Even one, like it in that one describes.
    In SI system of units is A (of : AREA) that Symbol of the Area. The use of the F as symbol became outdated. The basic unit is that (m2). For further Square measures see there.
  2. In the mathematical subsections that Differentialgeometrie and Topology designates one a two-dimensional Diversity as Surface. In particular such a surface can be also curved. See: Surface (topology).
  3. the smooth (flatten) exterior of a body/article, thus those Surfaces an object.
    Then a surface can be also curved. Example: Crystal face, Boundary surface, Earth's surface.
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