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几何体
Author:
DongHai Zhang
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GeoGebra
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【案例】2013年安徽高考15题
三位數除以一位數（二）
第八周作业
直角坐標平面上的旋轉變換
兩組對邊相等和有直角的四邊形
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樞紐實驗
Projection of vector in R2
GGB研習成果01
例题2（P点可拖动）
S3 Ex4.3 Q02(3D圖)
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Rectangle
Probability
Complex Numbers
Cosine
Dilation