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勾股定理证明
Author:
万超杰
GeoGebra
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四邊形的特性
兩位數加法
【案例】2013年安徽高考15题
畫出對稱圖形
算柱 (兩位數)
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圓與切線
testing
比較利益
geogebra
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Discover Topics
Logic
Exponential Functions
Symmetry
Distributions
Matrices