¶ Decimal and Duodecimal
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Index Entry
Pictured at Synergetics Illus. #697 are the 15 great circles developing from rotation of the icosahedron in respect to the 15 axes interconnecting opposite midpoints of the icosahedron’s 30 edges. The 120 resulting right spherical triangles represent the maximum unitary subdivision of a one-radius system. This fact was long known in mathematics. Since 120 is 10 times 12… this geometric relationship may underlie both the decimal and duodecimal systems of modular accounting; and may have been derived by subdividing a finite system into its lowest common denominator,… We inherited the combined decimal and duodecimal systems from this fundamental thinking in early Babylonian science and in the mathematical invention of the Sino-Indian navigators.
