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三视图1
Author:
杨欣霞
GeoGebra
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兩組對邊相等和有直角的四邊形
【案例】2013年安徽高考15题
畫出對稱圖形
錐體建築師
三位數除以一位數（二）
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畢氏定理
Area of Triangle_2
畢氏定理學生(楊知樾)
張春興0302
parabola 抛物线方程求解
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Circle
Trigonometric Functions
Trigonometry
Random Variables
Root