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when toggle format what by license comment
Jan 15, 2023 at 6:55 history edited Martin Sleziak CC BY-SA 4.0
http -> https (the question was bumped anyway)
May 5, 2012 at 7:45 comment added Junyan Xu Oh, I previously thought that eight regular tetrahedra with side length 1 fit in one with side length 2. That might be a more common false belief.
May 4, 2010 at 22:18 history answered Igor Pak CC BY-SA 2.5