http://www.cut-the-knot.org/pythagoras/index.shtml

http://www.cut-the-knot.org/pythagoras/PythagorasBySimilarity.shtml

http://jwilson.coe.uga.edu/emt669/Student.Folders/Morris.Stephanie/EMT.669/Essay.1/Pythagorean.html

https://betterexplained.com/articles/measure-any-distance-with-the-pythagorean-theorem/

http://www-history.mcs.st-and.ac.uk/~john/analysis/Lectures/L15.html

http://www.shmoop.com/squares-square-roots/pythagorean-theorem.html

http:///wiki/?pythagoras

28jul17

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