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congruent (AAA) 2
Author:
Ricky Chan
GeoGebra
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【案例】2013年安徽高考15题
畫出對稱圖形
画直线等分三角形的面积
四邊形的特性
兩位數除以一位數（二）
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Copy of 長方形與正方形的面積
Incentre
Tangent perpendicular to radius
黃金螺線62326 劉虹圻
心脏线切线族
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Straight Lines
Geometric Mean
Differential Calculus
Multiplication
Arithmetic Operations