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光的反射
Author:
樊双平
GeoGebra
New Resources
異分母分數減法
三位數除以一位數（二）
四邊形的特性
兩位數加法
算柱 (兩位數)
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中線定理(阿波羅尼奧斯)定理推廣二：向四邊形推廣
Copy of Area of square
椭圆的生成
St. Line
GeoGebra笔记功能体验课件
Discover Topics
Trigonometric Functions
Translation
Circle
Differential Equation
Sphere