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Behold a Square
(sh.itjust.works)
Memes related to mathematics.
Rules:
1: Memes must be related to mathematics in some way.
2: No bigotry of any kind.
Lol
I just read another comment here pointing out that square is a polygon, which requires having only straight lines.
I think this would be a stronger argument.
I'm not aware of any shape that is defined by the angles of its outsides.
I think what the previous poster is saying is that the image does not have four 90° angles, but instead it has two 90° and two 270° angles.
...I have no idea if that's an actual deal breaker, but the logic is sound.
I suspect these lines are straight on a sphere. What we're seeing is a square on a projected sphere.