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Author:
chuck.ncyu
GeoGebra
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球体的体积推导（优化版）
科氏力 (Coriolis Force)
画直线等分三角形的面积
圓的基本性質
祖冲之的期望：内棋与外棋
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new book
試算表應用
勒洛三角形(方型鑽子模型)
工具：PlaneArrows, PlaneText... (v.2)
椭圆的两条垂直切线的交点轨迹 蒙日圆
Discover Topics
Prism
Sequences and Series
Centroid or Barycenter
Optimization Problems
Circle