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Author:
陈铁成
GeoGebra
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四邊形的特性
算柱 (兩位數)
GeoGebra笔记功能体验课件
sanjiaohanshu
小数 的副本
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垂直平分線
梯形
迭代出根號n螺旋線
斯霍滕(Schooten)定理(與角平分線定理等價)
複數：正方形內的正方形
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Combinatorics
Logic
Exponent
Percentages
Area