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翰林數學_2下_CH4-2_平行四邊形性質
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翰林數學
GeoGebra
New Resources
sanjiaohanshu
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
長方體平面投影 (Codex版)
Discover Resources
集合
Normal dist. (常態分布互動ggb)
Copy of 閱讀鐘面及數字鐘（時和分）
立體測量：兩仰角
認識分數的副本
Discover Topics
Statistical Characteristics
Trapezoid
Arithmetic Operations
Sequences and Series
Means