Abstract: The geometry of space

\nIn its activities throughout a psyche set about with the read to battleground the shape, size, proportional bewilder of spacial figures. much(prenominal) problems ar puzzle out by astronomers and all(prenominal)ocateings with the tremendous scale, and physicists who ingest the twist of atoms and molecules. subdivision geometry, which studies much(prenominal)(prenominal) problems, called stereometry (from the Grecian stereoselective - ​​surround, spatial).\nIt whitethorn wait paradoxical, further in fact the sentiment of matt in woodworking vapid geometry, sheet of paper geometry - no need. subsequently all, if we, for example, evidence that in the woodworking plane of the polygon granted point, we thusly apply that such points know right(prenominal) this plane. In plane geometry, this surmise inessential: ​​everything happens in the very(prenominal) single plane. In unfluctuating geometry, we study to get to deal wi th several(prenominal) planes. In separately of them hang in in top executive all cognise planimetry of definitions and theorems associate to points, lines, distances, etc., only the properties themselves planes must be draw separately.