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Author:
iedc
GeoGebra
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兩組對邊相等的四邊形
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
【案例】2018年全国1卷理科12题
畫出對稱圖形
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畢氏定理
七巧板（tangram）的副本
星星
方块堆叠
正方体展开图的副本
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Trapezoid
Confidence Interval
Binomial Distribution
Plane Figures or Shapes
Indefinite Integral