Cartesian Equation of a Line

Rarely Tested

Cartesian Equation of a Line

A line passing through:

$$P(x_1,y_1,z_1)$$

with direction ratios:

$$a:b:c$$

has equation:

$$\frac{x-x_1}{a}=\frac{y-y_1}{b}=\frac{z-z_1}{c}$$

Usage

- Standard Cartesian form of a line in 3D.

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