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