# Category:Definitions/Normal Vectors

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This category contains definitions related to Normal Vectors.

Related results can be found in Category:Normal Vectors.

Let $S$ be a surface in ordinary $3$-space.

Let $P$ be a point of $S$.

Let $\mathbf n$ be a vector whose initial point is at $P$ such that $\mathbf n$ is perpendicular to $S$ at $P$.

Then $\mathbf n$ is a **normal vector** to $S$ at $P$.

## Pages in category "Definitions/Normal Vectors"

The following 3 pages are in this category, out of 3 total.