They address it without bringing it up. DJSM
*** it-2 p. 425 Molten Sea (Copper Sea) ***
Circumference. The circumference of 30 cubits is evidently a round figure, for more precisely it would be 31.4 cubits. In this regard, Christopher Wordsworth quotes a certain Rennie as making this interesting observation: “Up to the time of Archimedes [third century B.C.E.], the circumference of a circle was always measured in straight lines by the radius; and Hiram would naturally describe the sea as thirty cubits round, measuring it, as was then invariably the practice, by its radius, or semi-diameter, of five cubits, which being applied six times round the perimeter, or ‘brim,’ would give the thirty cubits stated. There was evidently no intention in the passage but to give the dimensions of the Sea, in the usual language that every one would understand, measuring the circumference in the way in which all skilled workers, like Hiram, did measure circles at that time. He, of course, must however have known perfectly well, that as the polygonal hexagon thus inscribed by the radius was thirty cubits, the actual curved circumference would be somewhat more.” (Notes on the King James Version, London, 1887) Thus, it appears that the ratio of three to one (that is, the circumference being three times the diameter) was a customary way of stating matters, intended to be understood as only approximate.