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徐熙伟
GeoGebra
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三位數除以一位數（一）
找出對稱軸
第八周作业
畫出對稱圖形
四邉形 (四年級) 教師版
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三角函數圖形
這是什麼角？
相似三角形
[S2] a revised version of Jane’s GeoGebra file (modified by the author)
中位线的副本
Discover Topics
Cube
Median Line
Linear Programming or Linear Optimization
Matrices
Pyramid