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例2 22.5 67.5
Author:
谢鹏
GeoGebra
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撒针估算面积实验
第八周作业
双心四边形
第八周作业1
常见四边形是否是双心四边形
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周考最后一题
九點圓
江苏省职校数学网络资源
軸對稱的副本
Quiz on Addition and Subtraction of Directed Numbers (1)
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LCM and GCD
Mathematics
Cube
Matrices
Percentages