Line Through a Point Perpendicular to a Given Direction

Rarely Tested

Line Through a Point Perpendicular to a Given Direction

## Formula

For point $$(x_1,y_1)$$ and given direction $$(a,b)$$:

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

## Usage

- Used when the required line must be perpendicular to a specified direction.

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