The proof by Pythagoras probably was not a general one, as the theory of proportions was developed only two centuries after Pythagoras; see (Maor 2007, hlm. 25)
Bogomolny, Alexander. "Pythagorean Theorem". Interactive Mathematics Miscellany and Puzzles. Alexander Bogomolny. Diarsipkan dari versi asli tanggal 2010-07-06. Diakses tanggal 2010-05-09.Parameter |url-status= yang tidak diketahui akan diabaikan (bantuan)
doi.org
Mike Staring (1996). "The Pythagorean proposition: A proof by means of calculus". Mathematics Magazine. Mathematical Association of America. 69 (1): 45–46. doi:10.2307/2691395. JSTOR2691395.
Bruce C. Berndt (1988). "Ramanujan – 100 years old (fashioned) or 100 years new (fangled)?". The Mathematical Intelligencer. 10 (3): 24. doi:10.1007/BF03026638.
jstor.org
Mike Staring (1996). "The Pythagorean proposition: A proof by means of calculus". Mathematics Magazine. Mathematical Association of America. 69 (1): 45–46. doi:10.2307/2691395. JSTOR2691395.
Bogomolny, Alexander. "Pythagorean Theorem". Interactive Mathematics Miscellany and Puzzles. Alexander Bogomolny. Diarsipkan dari versi asli tanggal 2010-07-06. Diakses tanggal 2010-05-09.Parameter |url-status= yang tidak diketahui akan diabaikan (bantuan)