Kaj_Sotala comments on Open Thread, May 19 - 25, 2014 - Less Wrong Discussion
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DragonBox has been mentioned on this site a few times, so I figured that people might be interested knowing in that its makers have come up with a new geometry game, Elements. It's currently available for Android and iOS platforms.
Geometry used to be my least favorite part of math and as a result, I hardly remember any of it. Playing this game with that background is weird: I don't really have a clue of what I'm doing or what the different powers represent, but they do have a clear logic to them, and now that I'm not playing, I find myself automatically looking for triangles and quadrilaterals (had to look up that word!) in everything that I see. Plus figuring out what the powers do represent makes for an interesting exercise.
I'd be curious to hear comments from anyone who was already familiar with Euclid before this.
Not an expert, but Euclid made some mistakes, like using superposition to prove some theorems. I'm curious how they handle those. (e.g. I think Euclid attempted to prove side-angle-side congruence, but Hilbert had to include it as an axiom.)