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矩形
Author:
eyun306
GeoGebra
New Resources
錐體建築師
四邊形的特性
兩位數除以一位數（二）
拼砌四邊形
【案例】2013年安徽高考15题
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Slope of a St. Line (formula)
密鋪圖形
九九乘法表的認識
Ellipse_Vertical
Tangent to a curve at a point
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Percentages
Stochastic Process or Random Process
Congruence
Diagrams
Terms