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Slope of Perpendicular Lines
## Formula
If:
$$l_1\perp l_2$$
then:
$$m_1m_2=-1$$
## Usage
- Used to establish or verify perpendicularity between two non-vertical lines.
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Slope of Perpendicular Lines
## Formula
If:
$$l_1\perp l_2$$
then:
$$m_1m_2=-1$$
## Usage
- Used to establish or verify perpendicularity between two non-vertical lines.
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