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GeoGebra
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GeoGebra
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两平面夹角
Author:
刘莹
GeoGebra
New Resources
畫出對稱圖形
柱體建築師
算柱 (兩位數)
拼砌四邊形
三位數除以一位數（二）
Discover Resources
triangle
正多面體
橢圓動畫
工具：PlaneText, PlaneArrow
負指數的計算
Discover Topics
Dilation
Median Line
Special Points
Area
Plane Figures or Shapes