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Author:
Chen, shih-hsiung
GeoGebra
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【案例】2013年安徽高考15题
兩組對邊相等的四邊形
直角坐標平面上的旋轉變換
柱體建築師
兩位數除以一位數（一）
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碎形
hello
三角形的构成的副本
角谷猜想
（三）观察物体
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Geometry
Arithmetic
Tree Diagrams
Means
Optimization Problems