ChatterBank1 min ago
Union Flag
Just been watching the news coverage from the G8 meeting in France and I noticed that the Union flag was being flown upside down. Did anyone else notice it?
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>>>rotational symmetry of order 4????
Unless mathematics has changed greatly since I used to teach it, that means that the flag must be SQUARE!
While the flag does have rotational symmetry of order 2,
http://www.cs.bath.ac...he_United_Kingdom.png
anyone flying it upside down won't have rotated it (because it can only be attached at one edge). It will have been reflected along a horizontal axis, resulting in this:
http://www.woodlands-...raphy/unionjack7.html
Unless mathematics has changed greatly since I used to teach it, that means that the flag must be SQUARE!
While the flag does have rotational symmetry of order 2,
http://www.cs.bath.ac...he_United_Kingdom.png
anyone flying it upside down won't have rotated it (because it can only be attached at one edge). It will have been reflected along a horizontal axis, resulting in this:
http://www.woodlands-...raphy/unionjack7.html
Well, that's me told.
However, if you forced me to stand staring at the two versions for 4 hours, all the time poking my bare buttocks with red-hot irons, I would still not be able to tell the difference, nor understand what effect it would have on the common weal of the United Kingdom, beneficial or otherwise.
However, if you forced me to stand staring at the two versions for 4 hours, all the time poking my bare buttocks with red-hot irons, I would still not be able to tell the difference, nor understand what effect it would have on the common weal of the United Kingdom, beneficial or otherwise.