A good answer might be:

Yes — maybe the dot product is large when the angle is close to zero and small when the angle is close to perpendicular.

Example Dot Products


The answer is correct, but a little vague. Let us tighten it up. For now, think about 2D vectors. Consider vector a in the diagram and its dot product with two other vectors, b oriented at 30°, and c oriented at 60°.



Which do you think is larger:

a · b , or
a · c  ?