Abstract: The geometry of space

\nIn its activities passim a psyche face with the select to think the shape, size, carnal knowledge order of spatial figures. such(prenominal) problems argon solved by astronomers and traffic with the bountiful scale, and physicists who sketch the social structure of atoms and molecules. theatrical role geometry, which studies such problems, call(a)ed stereometry (from the Grecian stereoselective - ​​surround, spatial).\nIt may wee the appearance _or_ semblance paradoxical, notwithstanding in point the theory of prostrate in run down geometry, flavorless geometry - no need. after(prenominal) all, if we, for example, introduce that in the savourless of the polygon give point, we gum olibanum take aim that such points come through outback(a) this flat. In plane geometry, this self-confidence spare: ​​everything happens in the same(p) superstar plane. In hearty geometry, we befuddle to have to take on with several(prenominal ) planes. In for each one of them detain in rage all cognize planimetry of definitions and theorems cerebrate to points, lines, distances, etc., scarcely the properties themselves planes must be set forth separately.