Normal (geometry)

A normal to a surface at a point is the same as a normal to the tangent plane to that surface at that point.

In geometry, a normal is an object such as a line or vector that is perpendicular to a given object. For example, in the two-dimensional case, the normal line to a curve at a given point is the line perpendicular to the tangent line to the curve at the point.

单词	Normal direction
释义	Normal direction 英语百科 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 the two-dimensional case, the normal line to a curve at a given point is the line perpendicular to the tangent line to the curve at the point.
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Normal direction

Normal (geometry)