There are several causes of dry mouth: 1  Effects of certain medications. 2  Side effects of certain medical conditions, for example SjÃ¶gren's syndrome, and infections. 3  Side effect of certain medical treatments.  Nerve 1  damage. Dehydration.  Surgical removal of the salivary 1  glands. Lifestyle.
Euclidean geometry. Euclidean geometry is a mathematical system attributed to the Alexandrian Greek mathematician Euclid, which he described in his textbook on geometry: the Elements. Euclid's method consists in assuming a small set of intuitively appealing axioms, and deducing many other propositions (theorems) from these.
3 (Geometry) the most elementary geometric figure in Euclidean space of a given dimension; a line in one-dimensional space or a triangle in two-dimensional space. (C16: from Latin: simple, literally: one-fold, from sim- one + plex, from plicare to fold; compare duplex)