The obvious answer is that manhole covers should be round because manholes are round.
But your answer is more informative.
that was my first thought.."so that they fit" lol
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Posted 19 November 2008 - 09:46 PM
Veracity, the veracity of your statement is suspect:
"There is not a single shape (besides perfectly round) that could not be positioned in a way that would cause it to fall in the hole." , You couldn't be more wrong!
heard of "constant diameter curves" ?
A circle is just one of many such curves:
That said, you are bang on target with your second statement about the ease of rolling
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