Vaguely defined vector related question

[FermatPell]

Homework Statement

Vectors can be perpendicular in two ways. Show them!

Homework Equations

none

The Attempt at a Solution

I know a lot about vectors, but I'm just not sure what I'm supposed to do. Maybe demonstrate that cross product is anti-commutative?

 

[PhanthomJay]

Maybe just a picture of a vector with i, j, and k (x,y,z) components, each component of which is mutually perpendicular to the others? The cross product i X j = k is a good one.

 

[tiny-tim]

Hi FermatPell!

Vectors can be perpendicular in two ways. Show them!

I can't think of two ways … perpendicular is perpendicular.

What type of vectors are they talking about?

(and is that the exact question?)​