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折叠问题一例
Author:
孟宝兴
GeoGebra
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兩位數除以一位數（一）
畫出對稱圖形
四邊形的特性
小数 的副本
【案例】2018年全国1卷理科12题
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折线逼近 exp(x)
鏡射再旋轉
Quiz on Special Lines in Triangles 三角形內的特殊線：測驗
ex 3
對頂角_2
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Tree Diagrams
Constructions
Sphere
Perimeter
Circle