Oberflächeninhalt
Surface area of a 3D-figure
3D-figures like spheres, cubes, cylinders, pyramids and so on have a surface. The surface area could be measured in square centimetres, square metres or any other unit of area. This surface area is called "Oberflächeninhalt" in German. It is often abbreviated to "Oberfläche" if there is no danger of misunderstanding.