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.
1. (Mathematics) of, having, or relating to three dimensions: three-dimensional space. 2. (Photography) (of a film, transparency, etc) simulating the effect of depth by presenting slightly different views of a scene to each eye. 3. (Mathematics) having volume. 4. lifelike or real.