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兩針夾角

Author:李春培

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拼砌四邊形
四邊形的特性
GeoGebra笔记功能体验课件
直角坐標平面上的旋轉變換
兩組對邊相等的四邊形

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圓與切線
勝者即正義
加法(10一數的副本
拼出三角形的副本
勾股定理的证明

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Similar Triangles
Scalene Triangles
Volume
Rectangle
Tangent Line or Tangent

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