Condition for Three Lines to Be Concurrent

Condition for Three Lines to Be Concurrent

## Formula

For:

$$L_1=0,\quad L_2=0,\quad L_3=0$$

the three lines are concurrent if the point of intersection of $$L_1=0$$ and $$L_2=0$$ also satisfies:

$$L_3=0$$

## Usage

- Used to test whether three straight lines pass through one common point.