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93.15 Some theorems about perpendicular lines, proved using an extension of Pythagoras’ theorem
Published online by Cambridge University Press: 01 August 2016
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- Copyright © The Mathematical Association 2009
References
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Lalescu, T., Géométrie du triangle, Editions Jacques Gabay, 2003 (First edition in 1937).Google Scholar
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Marchitan, G., Problem 22607, Gazeta matematica, Issue 2–3/1992. Softwin Electronic Database, Bucharest, 2005.Google Scholar