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優良作品2
Author:
Ching-Hui Chou
GeoGebra
New Resources
找出對稱軸
兩位數除以一位數（一）
錐體建築師
算柱 (兩位數)
四邉形 (四年級) 教師版
Discover Resources
Erdos-Mordell 不等式
abcd
ghseh 二次函數描點法頂點式-1
銳角三角：tan
游戏
Discover Topics
Conic Sections
Piecewise Functions
Parametric Curves
Planes
Geometric Transformations