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"Primative" Pythagorean Triples

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One- and Two-digit Pythagorean Triples
(Special thanks to Zack Kitzmiller)

Sets of numbers where a2 + b2 = c2

Common triples (listed as a, b, c):

        3, 4, 5
        5, 12, 13
        7, 24, 25
        8, 15, 17
        9, 40, 41

Not so common triples (again listed as a, b, c):

        11, 60, 61
        12, 35, 37
        13, 84, 85
        16, 63, 65
        20, 21, 29
        28, 45, 53
        33, 56, 65
        36, 77, 85
        39, 80, 89
        48, 55, 73
        65, 72, 97

In general, these can be generated by finding numbers m and n where

        a = m2 - n2
        b = 2mn
        c = m2 + n2

m and n should be relative primes and m > n

Any "scaled" multiple of a primative Pythagorean triple will also be a Pythagorean triple.  For example, since 3, 4, 5 is a Pythagorean triple, so is

6, 8, 10  (ie., 3x2, 4x2, 5x2)
9, 12, 15  (ie., 3x3, 4x3, 5x3)  and so on.


 
Last Modified: Feb 15, 2008