CONVERSION

, or Convertendo, is when there are four proportionals, and it is inferred, that the first is to its excess above the 2d, as the third to its excess above the 4th: according to Euclid, lib. 5, def. 17.

Thus, if it be8 : 6 :: 4 : 3,
then convertendo, or by conversion,8 : 2 :: 4 : 1,
Or if there bea : b :: c : d,
then convertendo, or by conversion,a : a-b :: c : c-d.

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Entry taken from A Mathematical and Philosophical Dictionary, by Charles Hutton, 1796.

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CONTIGUITY
CONTIGUOUS
CONTINENT
CONTINUAL Proportionals
CONTRAVALLATION
* CONVERSION
CONVEX
CONVEXITY
COPERNICAN
COPERNICUS (Nicholas)
COPERNICUS