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Author:
Alex CHIK
GeoGebra
gMath 互動數學教室
http://www.geogebra.hk
New Resources
祖冲之的期望：内棋与外棋
讀磅
球体的体积推导（优化版）
多邊形的面積
球体的体积推导
Discover Resources
平行四邊形面積教材四
齿轮咬合
Spiral Polyskelion
旋轉指令
Protractor-usage
Discover Topics
Parabola
Expected Value
Plane Figures or Shapes
Rhombus
Cylinder