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WikiPedia: Rangkap tiga Pythagoras http://blah.math.tu-graz.ac.at/~frisch/wwwpdf/pyth... http://mathcentral.uregina.ca/mp/previous2005/feb0... http://www.friesian.com/pythag.htm http://mathworld.wolfram.com/PythagoreanTriple.htm... http://www.hbmeyer.de/pythagen.htm http://www.math.brown.edu/johsilve/frintch1ch6.pdf http://www.math.brown.edu/~jhs/frint.html //arxiv.org/abs/0809.4324 http://www.cut-the-knot.org/pythagoras/PT_matrix.s... http://www.cut-the-knot.org/pythagoras/pythTriple....