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Author:jaycheung2016plk

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畫出對稱圖形
GeoGebra笔记功能体验课件
sanjiaohanshu
兩組對邊相等和有直角的四邊形
小数的副本

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四下_面積（一）(學生版)
動態角=30
GeoGebra Tube
Values of nCr & nPr 排列與組合的值
習題0330-2017

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Kite
Plane Figures or Shapes
Geometric Transformations
Symmetry
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