A DoubleQuote in the (Arctic) Wild

[ by Charles Cameron — always on the lookout for intriguing double-images ]

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This really clears up confusion between polar and cartesian coordinates. pic.twitter.com/02euAzTBQn

— Christopher Clark (@Frencil) January 1, 2014

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There’s an implied “this is to that as this is to that” double analogy here. Just how well or ill it teaches coordinate systems I leave to others to decide — even without the analogical joking though, it’s an intriguing visual juxtaposition.