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 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 Leonid Nechayev. Pioneer Slava Kurochkin dreams of space. He actively studies physics and astronomy, but at the same time he does not read fiction at all. By coincidence, he finds himself in a fairytale town, where the heroes of the most famous books live: "The Snow Queen", "Timur and His Squad", "The White Solitary Sails", "Les Misérables", "Treasure Island" and so on. But, alas, in the city live not only positive characters -