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Author:
军云
GeoGebra
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近似值：有效數字
四邊形的特性
拼砌四邊形
三位數除以一位數（二）
GeoGebra笔记功能体验课件
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讀磅
平面幾何
橢圓軌跡_過圓內一點與圓內切
Copy of 立體圖形－截面
錯角---垂直平行綫
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Continuity
Geometry
Complex Numbers
Sine
Fractions