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把心翻給妳
Author:
Wu Xiao-Ren
GeoGebra
New Resources
畫出對稱圖形
判斷球體
柱體建築師
球体的体积推导
球体的体积推导（优化版）
Discover Resources
研習講義
YH的GGB_BOOK
Drawing quadrilaterals on the grid or the pinboard
GGB3
折正三角形
Discover Topics
Surface
Volume
Arithmetic Mean
Plane Figures or Shapes
Curve Sketching