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Nine-point Circle

作者:Alex CHIK

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script of a talk by Mr. C.K. Leung on 25/4/2015 cover picture taken from http://www-history.mcs.st-and.ac.uk/Mathematicians/Feuerbach.html GeoGebra 互動數學教室 http://www.geogebra.hk

Nine-point Circle (Part 1)

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