Condition for Parallel Lines in General Form

Rarely Tested

Condition for Parallel Lines in General Form

## Formula

For:

$$A_1x+B_1y+C_1=0$$

and:

$$A_2x+B_2y+C_2=0$$

the lines are parallel if:

$$A_1B_2-A_2B_1=0$$

## Usage

- Used to test whether two lines are parallel without calculating their slopes.

No related questions available for this formula yet.

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