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Rabbi Nehemiah
Rabbi Nehemiah was an Israelite mathematician, circa AD 150 (during the Tannaim era, Fourth Generation).
He is attributed as the author of the ''Mishnat ha-Middot'' (ca. AD 150), making it the earliest known Hebrew text on geometry, although other historians assign to a later period by an unknown author.
The ''Mishnat ha-Middot'' argues against the common belief that the Bible defines the geometric ratio π (pi) as being exactly equal to 3, based on the description in 1 Kings 7:23 (and 2 Chronicles 4:2) of the great bowl situated outside the Temple of Jerusalem as having a diameter of 10 cubits and a circumference of 30 cubits. He maintained that the diameter of the bowl was measured from the ''outside'' brim, while the circumference was measured along the ''inner'' brim, which with a brim that is one handbreadth wide (as described in 1 Kings 7:24 and 2 Chronicles 4:3) yields a ratio from the circular rim closer to the actual value of π.〔Petr Beckmann, ''A History of Pi'', St. Martin's (1971).〕
== See also ==
* History of numerical approximations of π
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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