Properties of the legs of a right triangle

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Discussion Overview

The discussion centers around the properties of the legs of a right triangle, particularly whether a right triangle can have two legs that are both perfect powers of a number. Participants explore connections to Pythagorean triples and Fermat's Last Theorem.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant questions if it is impossible for a right triangle to have two legs that are both raised to the same perfect power.
  • Another participant suggests the question may relate to Pythagorean triples, providing examples of such triples and noting that only one element may be a power of a number.
  • A different participant emphasizes the ability to construct right triangles with arbitrary leg lengths, but notes that this affects the hypotenuse, which must satisfy the Pythagorean theorem.
  • One participant proposes a reformulation of the question in terms of integers and powers, linking it to Fermat's Last Theorem, while cautioning against confusing it with unrelated topics.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the original question, and multiple interpretations and viewpoints remain present throughout the discussion.

Contextual Notes

Some assumptions about the definitions of perfect powers and the nature of right triangles are not explicitly stated, and the relationship to Fermat's Last Theorem introduces additional complexity that remains unresolved.

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TL;DR
Is it true that there can be no more than one leg of a right triangle that is a perfect power of a number?
I want to know if a right triangle can only have one leg that is a perfect power of a number. Another words is it impossible for a right triangle to have two legs that are numbers that are raised to the same perfect power? Can somebody answer this question and show me the proof?
 
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I'm not sure I understand your question. Is it related to Pythagorean triples where only one element of the triple is some power of a number as in 4, 8, 16, 64 or 6, 9 as shown in the red hilighted triples below.

https://en.wikipedia.org/wiki/Pythagorean_triple

There are 16 primitive Pythagorean triples of numbers up to 100:

(3, 4, 5)(5, 12, 13)(8, 15, 17)(7, 24, 25)
(20, 21, 29)(12, 35, 37)(9, 40, 41)(28, 45, 53)
(11, 60, 61)(16, 63, 65)(33, 56, 65)(48, 55, 73)
(13, 84, 85)(36, 77, 85)(39, 80, 89)(65, 72, 97)
 
I am not sure I understand your question either, but anyway here is my take:
We can construct right triangles with the legs to be anything we want, but then the hypotenuse won't be anything we want, it would be such that it is equal to the square root of the sum of squares of the legs.
 
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I think the question is "do there exist integers a, b, c and n such that ## a^{2n} + b^{2n} = c^2 ##.

This is clearly related to Fermat's Last Theorem (FLT - although that should not be confused with Faster than Light Travel which we only talk about in the science fiction topic :biggrin:).
 
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