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Author:
洪馷孺
GeoGebra
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【案例】圆柱体内放置一个大球六个小球
四邉形 (四年級) 教師版
三位數除以一位數（一）
找出對稱軸
【案例】2013年安徽高考15题
Discover Resources
公切線的條數
regular tetrahedron in a cube
太极图
爱心
Copy of sin(x) 的函數圖形
Discover Topics
Conic Sections
Linear Functions
Ratios
Orthocenter
Functions