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Logic the Art of Reasoning

Mathematics  the Art of Studying Patterns Using Logic

Addition's Commutative Property,

Here Is an Exception

As you see, in the graphic example above, the result of adding up these two 90 degree turns (rotations) is not the same. In other words,

(if you are not familiar with th symbol  !=, it means not equal.)
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Last Update: Nov. 26, 2005