Seemingly Bent Category

All of the red lines are completely parallel would you believe?

At first, there doesn’t seem anything unusual about this picture. It’s just a bunch of diagonal lines and a slightly distorted square in the middle – right? Wrong. Believe it or not, the 4 lines that make up the square are actually perfectly straight. In fact it’s a perfect square. For proof of this, the [...]

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The floor appears to bulge out, even though all the squares in the figure are equal.

Is this a square? Although it appears that the square’s sides bend inwards, they are actually straight lines!