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几何与勾股定理
Author:
叶明杰
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數加法
四邉形 (四年級) 教師版
兩位數除以一位數（二）
三位數除以一位數（一）
Discover Resources
圖騰 DEMO
百分數
parallelogram and squares
試作
Triangle
Discover Topics
Boxplot
Special Points
Dilation
Addition
Median Line