Quote:
Originally Posted by aschen
Maybe I am missunderstanding what you are saying, but as you "crush a circle" the Area certainty goes down. Think about the extreme case where you crush it to a nearly flat elipsoid or oval, the area is almost zero.
It is the circumference that remains constant, and that is where the interface between the tube is, and the dimension that should be used
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yep, you're correct. It's the circumference that's constant. (Too early in the morning for this stuff!)