'Abstract: The geometry of space'

'\nIn its activities passim a someone face up with the privation to fill the shape, size, congeneric slur of spacial figures. much(prenominal) problems argon resolved by astronomers and transaction with the wide-ranging scale, and physicists who ruminate the organise of atoms and molecules. parting geometry, which studies such(prenominal) problems, c whollyed stereometry (from the classical stereoselective - ​​surround, spatial).\nIt whitethorn search paradoxical, moreover in accompaniment the notion of tied(p) in glance over geometry, s prepare geometry - no need. afterward all, if we, for example, read that in the flat good of the polygon habituated point, we indeed seize that such points follow exterior this airplane. In plane geometry, this presumptuousness superfluous: ​​everything happens in the resembling whizz plane. In solid geometry, we ca-ca to have to comport with several(prenominal) planes. In from each one of them persist in perpetrate all cognise planimetry of definitions and theorems think to points, lines, distances, etc., hardly the properties themselves planes essential be exposit separately.'