because it just isn't
It was measured in cubits (about 18 inches).
There are some that feel that the mathematical equation pi is discussed in the following verses: (1 Kings 7:23) And he proceeded to make the molten sea ten cubits from its one brim to its other brim, circular all around; and its height was five cubits, and it took a line of thirty cubits to circle all around it. (2 Chronicles 4:2) And he proceeded to make the molten sea ten cubits from its one brim to its other brim, circular all around, and its height was five cubits, and it took a line of thirty cubits to circle all around it. However, today some subscribe to the school of thought that the Bible is inaccurate in it's description. Keep in mind that today, we use pi as equivalent to 3.1416. However, in ancient times this level of decimals was not used.
144 cubits is a measure of length equal to 216 feet.
6 cubits = 9 feet (one cubits = 1.5 feet)
First there a UK cubits, long cubits, greek cubits, etc. Now, 1 Greek cubit computes to about 462.788 mm.
300 cubits or 350 cubits
683
15 cubits is about 24.61 feet.
One fathom is about 3.66 cubits.
144 cubits is about 236.22 feet.
10,000 cubits = 4,572 meters.
The "cubit" is an ancient unit of length, no longer used, that was defined as the length of the forearm. Since everyone's forearm has a different length, no two cubits were equal ... they ranged anywhere from 17 to 22 inches. Accordingly, 9 feet can range anywhere from 4.91 to 6.35 cubits.