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waaachen
Author:
陳兪宏
waaachen
GeoGebra
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兩位數加法
四邉形 (四年級) 教師版
拼砌四邊形
算柱 (兩位數)
球體建築師
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商高定理4
Equal chords cut off equal arcs in a circle
Angle Sum of Pentagon (SWC)
以面積固定平行線軌跡
我的第一个GGB绘本
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Triangles
Linear Regression
Frequency Distribution
Limits
Combinatorics