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48 sats \ 1 reply \ @south_korea_ln OP 10 Oct \ parent \ on: [Daily puzzle] Find area of white region science
It's a square. I started writing it's a square of side $a$ and then realized the value of $a$ didn't matter, so deleted that. I thus inadvertently also deleted the information about it being a square. Mea culpa.
I think it works for any rectangle
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