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proof24 羅文頡
Author:
郭亮偉
GeoGebra
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算柱 (兩位數)
四邊形的特性
【案例】2018年全国1卷理科12题
四邉形 (四年級) 教師版
sanjiaohanshu
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waaachen
正方形的旋轉
風車
教材製作-兩圓位置關係
中國火柴遊戲一
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Arithmetic Operations
Combinatorics
Geometric Transformations
Sequences and Series
Rhombus