Law of cosines

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

If —>

then,

To find triples that satisfy the relation

We use the parametric equations :

where and are integers and

Perimeter :

The first few primitive triples are:

In the case where are consecutive integers:

The first few triples such that

The first few triples such that

The first few triples such that

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