How to add a line to a given diagram so that the resulting figure has rotational symmetry but not line symmetry?

Question

So this is a question I found in the math D book by David Rayner. The diagram is given below.

How to add a line to this diagram so that the resulting figure has rotational symmetry but not line symmetry?

I have seen a solution on the internet like this,

But it doesn't work since the diagram still has line symmetry. Can anyone suggest me a solution to this? It will be very beneficial.

Answer 1

$${}{}{}{}{}{}{}\mathsf{N}{}{}{}{}{}{}{}$$