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2018秋八年级数学上册第14章勾股定理14.1勾股定理14.1.3反证法习题课件（新版）华东师大版.ppt

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第14章 勾股定理 14.1 勾股定理 14.1.3 反证法,反证,反面,假设,原结论,不平行于,12180,假设,C90,勾股定理,AC2BC2AB2,AC2BC2AB2,负数,矛盾,假设不成立,

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