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Angle Bisectors Through Distance Equality
## Formula
For lines:
$$L_1=0,\quad L_2=0$$
the angle bisectors satisfy:
$$\frac{L_1}{\sqrt{A_1^2+B_1^2}}=\pm\frac{L_2}{\sqrt{A_2^2+B_2^2}}$$
## Usage
- Used to derive both angle bisectors directly from the equal-distance property.
