# How to find if all vectors are on the same plane?

vectors list:

A(2,-1,-2)

B(1,2,1)

C(2,3,0)

D(5,0,-6)

if  $\left(\stackrel{⇀}{AB}×\stackrel{⇀}{AC}\right)·\stackrel{⇀}{AD}=0$ then all vectors are on the same plane.

vectors are on the same plane.