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Proof2
Author:
郭亮偉
GeoGebra
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算柱 (兩位數)
拼砌四邊形
三位數除以一位數（一）
兩位數除以一位數（一）
【案例】2013年安徽高考15题
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圓外一點到圓的距離
Perigal's Dissection
ghseh 二次函數描點法上下平移-1
勝者即正義
褶正三角形
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Circle
Kite
Statistical Characteristics
Random Variables
Root