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Pythagore Triple

Tool to generate Pythagorean triples. A Pythagorean triple is a set of three natural numbers a, b, and c, such that a^2+b^2=c^2, for example (3,4,5) is a Triple of Pythagore: 3^2+4^2=5^2

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Pythagore Triple -

Tag(s) : Mathematics, Geometry

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Pythagore Triple

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Generate Pythagorean Triples

With a given perimeter



With two sides



Tool to generate Pythagorean triples. A Pythagorean triple is a set of three natural numbers a, b, and c, such that a^2+b^2=c^2, for example (3,4,5) is a Triple of Pythagore: 3^2+4^2=5^2

Answers to Questions

How to find a Pythagorean Triple?

It exists heuristics but the simple method consists in testing iteratively all possibilities of a and b when s is given, the value of c is constrained by s=a+b+c.

The following equations can be deducted:

$$ a^2 + b^2 = (s − a − b)^2 \\ a <= (s − 3)/3 \\ b < (s − a)/2 $$

Example: Consider \( s = 12 \), then \( a <= 3 \) and \( b < 4.5 \), a quick test allows to find \( a = 3, b = 4 \) and get the triple \( \{3,4,5\} \).

What is the list of Pythagorean Triples?

The first Pythagorean triples (side inferior to 100)

(3,4,5)(5,12,13)(6,8,10)
(7,24,25)(8,15,17)(9,12,15)
(9,40,41)(10,24,26)(11,60,61)
(12,16,20)(12,35,37)(13,84,85)
(14,48,50)(15,20,25)(15,36,39)
(16,30,34)(16,63,65)(18,24,30)
(18,80,82)(20,21,29)(20,48,52)
(21,28,35)(21,72,75)(24,32,40)
(24,45,51)(24,70,74)(25,60,65)
(27,36,45)(28,45,53)(28,96,100)
(30,40,50)(30,72,78)(32,60,68)
(33,44,55)(33,56,65)(35,84,91)
(36,48,60)(36,77,85)(39,52,65)
(39,80,89)(40,42,58)(40,75,85)
(42,56,70)(45,60,75)(48,55,73)
(48,64,80)(51,68,85)(54,72,90)
(57,76,95)(60,63,87)(60,80,100)
(65,72,97)

Is there a right-angled isosceles triangle with integer sides?

There is no Pythagorean triplet with 2 identical values. Indeed if 2 sides are \( a \) (natural integer), the last side is \( a \sqrt2 \) which can not be an integer.

Example: \( a = 1 \) the triplet becomes \( (1, 1, \sqrt2) \). By scaling, it is not possible to obtain an both isosceles and right triangle with integer sides.

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