簡單的說~數學式子:『Ａ=Ｂ，Ｂ=Ｃ，所以Ａ=Ｃ』
舉例:
小麥(A)是動物(B),豬(C)也是動物(B),所以說小麥就等於豬!!??
錯
根本上就錯了
應該說
(A)"屬於"(B)~(C)"屬於"(B)
但不代表(A)"屬於"(C)
邏輯推論
...
brandan 發表於 2010-8-17 23:48 
因為
In mathematics, the Pythagorean theorem or Pythagoras' theorem is a relation in Euclidean geometry among the three sides of a right triangle (right-angled triangle). In terms of areas, it states: In any right triangle, the area of the square whose side is the hypotenuse (the side opposite the right angle) is equal to the sum of the areas of the squares whose sides are the two legs (the two sides that meet at a right angle).The theorem can be written as an equation relating the lengths of the sides a, b and c, often called the Pythagorean equation:[1] a^2 + b^2 = c^2\!\,where c represents the length of the hypotenuse, and a and b represent the lengths of the other two sides. These two formulations show two fundamental aspects of this theorem: it is both a statement about areas and about lengths. Tobias Dantzig refers to these as areal and metric interpretations.[2][3] Some proofs of the theorem are based on one interpretation, some upon the other. Thus, Pythagoras' theorem stands with one foot in geometry and the other in algebra, a connection made clear originally by Descartes in his work La Géométrie, and extending today into other branches of mathematics.[4]The Pythagorean theorem has been modified to apply outside its original domain. A number of these generalizations are described below, including extension to many-dimensional Euclidean spaces, to spaces that are not Euclidean, to objects that are not right triangles, and indeed, to objects that are not triangles at all, but n-dimensional solids.The Pythagorean theorem is named after the Greek mathematician Pythagoras, who by tradition is credited with its discovery and proof,[5][6] although it is often argued that knowledge of the theorem predates him. (There is much evidence that Babylonian mathematicians understood the formula, although there is little surviving evidence that they fitted it into a mathematical framework.[7]) “[To the Egyptians and Babylonians] mathematics provided practical tools in the form of "recipes" designed for specific calculations. Pythagoras, on the other hand, was one of the first to grasp numbers as abstract entities that exist in their own right.”[8] In addition to a separate section devoted to the history of Pythagoras' theorem, historical asides and sources are found in many of the other subsections.The Pythagorean theorem has attracted interest outside mathematics as a symbol of mathematical abstruseness, mystique, or intellectual power. The article ends with a section on pop references to the theorem.
所以
止渴 = 消渴 #
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