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Author:
余銘芬
GeoGebra
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兩位數除以一位數（一）
算柱 (兩位數)
【案例】2013年安徽高考15题
畫出對稱圖形
四邊形的特性
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反射原理
利用对称求线段和最值
橢圓拋物面2
第一組
Angle at centre twice angle at circumference
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Distributions
Diagrams
Polygons
Interest Calculation
Equilateral Triangles