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Author:
龚洪萍
GeoGebra
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科赫雪花
活动三：应用性质
直線的斜率：水平變化 & 鉛垂變化
双心四边形
百分數及其應用
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橢圓
三角形與六邊形的結合
Multiplication of Directed Numbers
拼出三角形的副本
【高中物理】凸透镜成像
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Probability
Special Points
Derivative
Tangent Function
Trigonometric Functions