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素数表
Author:
zhen chen
GeoGebra
New Resources
垂直線的斜率
圓周公式的應用
平行線的判定
祖冲之的期望：内棋与外棋
龙形曲线-分形龙
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拋物線的光學性質
拼圖遊戲
正三角形
congruent triangle_provided by Mr Yeung Kar Chun
基础知识
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Optimization Problems
Median Line
Cuboid
Secant Line or Secant
Poisson Distribution