Equation of a Line Perpendicular to a Vector

Rarely Tested

Equation of a Line Perpendicular to a Vector

## Formula

A line through $$(x_1,y_1)$$ perpendicular to vector $$(a,b)$$ is:

$$a(x-x_1)+b(y-y_1)=0$$

## Usage

- Used when a normal vector to the required line is given.

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