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"拈" 類遊戲之一-搶21遊戲 The 21 game
Author:
侯杰材
GeoGebra
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判斷球體
四邊形的特性
GeoGebra笔记功能体验课件
畫出對稱圖形
四邉形 (四年級) 教師版
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方格紙上畫平行四邊形4
畢式定理 (07)
有向數的加法
Light reflected in ellipse
利用对称求线段和最值（移动端）的副本
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Random Experiments
Real Numbers
Addition
Numbers
Continuity