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Normal (geometry) - Wikipedia

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In geometry, a normal is an object (e.g. a line, ray, or vector) that is perpendicular to a given object. For example, the normal line to a plane curve at a given point is the line perpendicular to the tangent line to the curve at the point. A normal vector of length one is called a unit normal vector. A curvature vector is a normal vector whose length is the curvature of the object. Multiplying a normal vector by −1 results in the opposite vector, which may be used for indicating sides (e.g., interior or exterior). In three-dimensional space, a surface normal, or simply normal, to a surface at point P is a vector perpendicular to the tangent plane of the surface at P. The word normal is also used as an adjective: a line normal to a plane, the normal component of a force, the normal vector, etc. The concept of normality generalizes to orthogonality (right angles). The concept has been generalized to differentiable manifolds of arbitrary dimension embedded in a Euclidean space. The norm

Normal (geometry) - Wikipedia Jump to content From Wikipedia, the free encyclopedia Line or vector perpendicular to a curve or a surface "Normal vector" redirects here. For vector spaces equipped with a generalization of magnitude, see Normed vector space . A polygon and its two normal vectors A normal to a surface at a point is the same as a normal to the tangent plane to the surface at the same point. Tangent and normal to a curve in a Cartesian coordinate system . In geometry , a normal is an object (e.g. a line , ray , or vector ) that is perpendicular to a given object. For example, the n

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