Angle Bisectors of Two Lines

Angle Bisectors of Two Lines

## Formula

For two lines:

$$A_1x+B_1y+C_1=0$$

and:

$$A_2x+B_2y+C_2=0$$

their angle bisectors are:

$$\frac{A_1x+B_1y+C_1}{\sqrt{A_1^2+B_1^2}}=\pm\frac{A_2x+B_2y+C_2}{\sqrt{A_2^2+B_2^2}}$$

## Usage

- Used to find the equations of the internal and external angle bisectors of two intersecting lines.