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Author:
杨桃李@
GeoGebra
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祖冲之的期望：内棋与外棋
漂亮的摇摆曲线
【案例】圆柱体内放置一个大球六个小球
第八周作业
【案例】2013年安徽高考15题
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扇形面積
Rotational symmetry of triangular prism
Angle in the same segment
表示數線上的位置
球體
Discover Topics
Fractal Geometry
Secant Line or Secant
Natural Numbers
Solids or 3D Shapes
Cylinder