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求一數是另一數的幾分之幾（比較）
Author:
Tong Wing Hong
GeoGebra
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【案例】2013年安徽高考15题
找出對稱軸
画直线等分三角形的面积
兩組對邊相等的四邊形
GeoGebra笔记功能体验课件
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包含除法（整數÷整數）
glt-c05-07 正七角錐旋轉
二元线性规划的图解法(习题3)
Uses of Trigonometry
错觉多边形
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Boxplot
Conditional Probability
Frequency Distribution
Symmetry
Sequences and Series