<p>In 3D space, the set of all vectors perpendicular to a vector v is a plane. Right?</p>
<p>Yes, but how is this an interesting question? Do you want to prove it?</p>
<p>In 3D space, the set of all vectors perpendicular to a vector v is a plane. Right?</p>
<p>Yes, but how is this an interesting question? Do you want to prove it?</p>