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四边形外角和

Author:陈宜红

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Earth with coastline
找出對稱軸
美國國旗 (Claude 版)
Nested spiral octagon
畫出對稱圖形

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學生自行製作棒形圖
日本國旗
聖誕樹
蜘蛛網製作
GeoGebra合作伙伴关系

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Triangles
Solids or 3D Shapes
Variance
Straight Lines
Vectors

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