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23平行线周长正方形
Author:
万超杰
GeoGebra
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兩組對邊相等的四邊形
錐體建築師
判斷球體
第八周作业
【案例】2013年安徽高考15题
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test
Ex5D#5
橢圓2--四圓心近似法
直线倾斜角与斜率的副本
sin(x) 的函數圖形的副本
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Rectangle
Conic Sections
Real Numbers
Stochastic Process or Random Process
Parallelogram