Posted by **Kirk** on Saturday, August 28, 2010 at 11:25pm.

What geometric properties make “SOS” a good choice

for the international distress symbol?

- Math -
**drwls**, Sunday, August 29, 2010 at 2:07am
There are three letters and the Morse Code of each is three easily remembered pattern of dots or dashes.

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- Math -
**Nana**, Saturday, October 17, 2015 at 10:31pm
It has point symmetry, so it looks the same rotated by 180 degrees.

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