H.B. Elkins is on a terror and brings us yet another mathematically significant roadsign, this time from Ohio.
This is the most common approximation of pi, but the great thing is how direct this winner makes it.
22 \div 7 \approx \pi
This sign was found on in Steubenville, Ohio just across the Ohio River from Weirton, West Virginia. See sign on map!
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