# How do I find the unit vector of a plane?

##### 1 Answer
Oct 19, 2014

I assume that the poster is looking for the unit normal vector of a plane. If the plane has the equation of the form

$a x + b y + c z = d$,

then the unit normal vector $\vec{n}$ of the plane is

$\vec{n} = \frac{\left(a , b , c\right)}{\sqrt{{a}^{2} + {b}^{2} + {c}^{2}}}$.

I hope that this was helpful.