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GGB練習
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涂老師
GeoGebra
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三角函数 的副本
直線的斜率：水平變化 & 鉛垂變化
活动三：应用性质
第八周作业2
龙形曲线-分形龙2
Discover Resources
特製的門
題二
光的反射
Multiplication of Polynomials(多項式的乘法)
原點對稱1
Discover Topics
Orthocenter
Geometric Distribution
Equilateral Triangles
Circumcircle or Circumscribed Circle
Special Points