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This chapter describes the Pythagorean triples. Pythagorean triples - triples of numbers such that the sum of the squares of the two numbers is equal to the square of the third. We know this formula, called the Pythagorean theorem. Demonstrates how to use the first Pythagorean triples and the relation of these numbers with a right triangle. Considered primitive Pythagorean triples - three, the number of which have no common factors. With the research methods of the previous chapter and investigated experimentally proved, that if a is even and b is odd, then the odd. Also shows the formulas for a, b and c. The theorem Pythagorean triples. The text explains the meaning of some mathematical symbols such as ... provides explanations for the expansion of factoring.
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