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生日问题1
Author:
徐晓东
GeoGebra
New Resources
龙形曲线-分形龙2
百分數及其應用
科赫雪花
圓的基本性質
圓的切線方程
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商高定理1
Properties of Inequalities 不等式的加法與乘法性質
三角形重心軌跡(動點在三圓上)
香港的硬幣
IMO2015D
Discover Topics
Tangent Line or Tangent
Surface
Vectors 3D (Three-Dimensional)
Trigonometry
Cone