Pole of a Plane

Rarely Tested

Pole of a Plane

For a sphere:

$$x^2+y^2+z^2=r^2$$

the pole of plane:

$$lx+my+nz=p$$

is:

$$P\left(\frac{r^2l}{p},\frac{r^2m}{p},\frac{r^2n}{p}\right)$$

Usage

- Used to determine the point corresponding to a given plane under sphere polarity.

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