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Product Description
Sure, it looks like four parabolas stuck together. And that's because... well, it is.
But viewed at just the right angle, from just the right distance, it can appear to be a circle... and from another angle, it can appear to be a square!
Don't believe me? Check out the "3D" viewing option in the picture, and experiment with rotating and zooming. Can you make a circle? Can you make a square?