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商高定理之新月形
Author:
李春培
商高定理之新月形
GeoGebra
New Resources
画直线等分三角形的面积
異分母分數減法
三位數除以一位數（二）
畫出對稱圖形
第八周作业
Discover Resources
test for 2nd view
方向導數與梯度 (Gradient)
三角函數
認識分數
繪畫梯形
Discover Topics
Similar Triangles
Step Functions
Random Experiments
Conic Sections
Mode