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Author:
johnmayhk
GeoGebra
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【案例】2013年安徽高考15题
柱體建築師
判斷球體
四邊形的特性
直角坐標平面上的旋轉變換
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梯形有甚麼特性？
少一塊
平行四邊形的副本
椭圆中的对称斜率为定值问题20190917
堑堵 鳖臑 阳马
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Special Points
Trigonometric Functions
Centroid or Barycenter
Polygons
Right Triangles