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Author:
Jianqiang He
GeoGebra
New Resources
柱體建築師
異分母分數減法
第八周作业
拼砌四邊形
【案例】2013年安徽高考15题
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橢圓尺規作圖Ex01
有趣的切圓
平面鏡成像 Image of Plane Mirror Reflection
內輪差...
改變係數觀察多項式圖形
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Sine
Upper and Lower Sum or Riemann Sum
Scalene Triangles
Geometric Distribution
Median Line