Right Triangle and the Pythagorean Triple Formula

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Discussion Overview

The discussion revolves around the properties of right triangles with whole number sides and the applicability of the Pythagorean triple formula. Participants explore whether this formula encompasses all possible right triangles with integer sides, including both primitive and non-primitive triples.

Discussion Character

  • Debate/contested

Main Points Raised

  • One participant questions if the Pythagorean triple formula is the only way to find the sides of a right triangle with whole numbers, suggesting the possibility of triangles that may not be captured by this formula.
  • Another participant seeks clarification on what is meant by "Pythagorean triple formula," noting that there are multiple formulas that can generate such triples.
  • A common formula for generating Pythagorean triples is presented, which involves integers m and n, where m>n>0, producing all possible integer triplets.
  • It is argued that the formula does not yield all possible triples, as it primarily generates primitive triples and some non-primitive ones, raising the question of whether a formula with only two variables could generate all triples.
  • A participant acknowledges that while some multiples of generated triples are covered, others are not, providing specific examples of triples that are and are not generated by the formula.
  • There is a suggestion that extending the formula by adding a common factor k could cover all multiples, though this may lead to multiple representations of some triplets.

Areas of Agreement / Disagreement

Participants express differing views on whether the Pythagorean triple formula captures all right triangles with whole number sides. There is no consensus on the completeness of the formula or the existence of alternative methods to generate all possible triples.

Contextual Notes

Participants note that the discussion involves assumptions about the definitions of triples and the limitations of the formulas presented, particularly regarding the generation of non-primitive triples.

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Given: A right triangle and all the sides of the triangle are whole numbers. Does this imply that all the sides of the triangle can only be found by using the Pythagorean triple formula? Another words, is it possible that a right triangle can exist with whole number sides that escape the Pythagorean triple formula? Or put another way, does the Pythagorean triple formula capture every possible right trangle with whole number sides?
 
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What exactly do you call "Pythagorean triple formula"? There are multiple formulas that produce those triples.
 
Usual formulas: a=2mn,\ b=m^2-n^2,\ c=m^2+n^2 for integers m>n>0, give all possible integer triplets.
 
ok. That's what I wanted to know.
 
This formula does not give all possible triples. It gives all primitives and a bunch of the non primitives, right? If you add the multiples of those then you get all. But then they wouldn't be uniquely expressed (I guess..?).

Would it be relevant to find a formula which generates them all with only two variables..?
 
Good point. Some multiples are covered, some are not.

(3,4,5) is generated by n=1, m=2, and (8,6,10) is generated by n=1, m=3, but (9,12,15) is not covered as 15 cannot be written as the sum of two squares.

It is trivial to extend the formula to cover all multiples, just add a common factor k to all three lengths. Then you get some triplets with more than one set of integers, but you cover all triplets at least once.
 

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