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火柴棒
Author:
richfan
GeoGebra
GeoGebra
New Resources
兩位數加法
兩組對邊相等和有直角的四邊形
找出對稱軸
三位數除以一位數（一）
兩組對邊相等的四邊形
Discover Resources
尺規作圖找平方根點(以根號2為例)
二次函數中參數對圖形的影響
空間畢氏定理
test000
Copy of 20151104 四邊形 P2
Discover Topics
Volume
Cosine
Addition
Probability
Indefinite Integral