Rotation.
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I believe your are talking about a 3D figure called a Mobius strip. It is a strip of paper that has a half-turn in it that causes technically a one sided figure.
you call them problems because you need to figure it out and it could come in your life and you have to figure it out
A figure has rotational symmetry if you can turn it about a figure.
I would call it a 102-gon.
a pentagon.