Foot of Perpendicular Lies on the Given Line

Rarely Tested

Foot of Perpendicular Lies on the Given Line

## Formula

If $$f$$ is the foot of perpendicular from $$p$$ to line $$l$$, then:

$$F\in L$$

and:

$$PF\perp L$$

## Usage

- Used to form simultaneous conditions for finding the foot of perpendicular.

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