Normal (geometry) Normal (geometry) In geometry, a normal is an object such as a line or vector that is perpendicular to a given object. For example, in two dimensions, the normal line to a curve at a given point is the line perpendicular to the tangent line to the curve at the point. In three dimensions, a surface normal, or simply normal, to a surface at a point "P" is a vector that is perpendicular to the tangent plane to that surface at "P". The word "normal" is also used as an adjective: a line normal to a plane, the normal component
Adventures in a City that does not Exist treacherous commerce adviser from the play "The Snow Queen" (by Evgeny Schwartz) decides to use Slavin's ignorance of books in order to deceive him and with the help of other antagonists to subjugate readers worldwide. The protagonists come to help the boy, and together with friends Slava manages to defeat the adviser and his henchmen. When Slava returns to the real world, the first thing he does is to go to the library. Adventures in a City that does not Exist Adventures in a City that does not Exist () is a 1974 Soviet children's musical film, directorial debut of