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Author:
johnmayhk
GeoGebra
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錐體建築師
球体的体积推导（优化版）
画直线等分三角形的面积
柱體建築師
找出對稱軸
Discover Resources
以「時」和「分」報時
基本三角函數
Ambiguous Cone
測試教案 80335 盧沛宏
Quiz on Signs of Coefficients of Quadratic Functions 二次函數係數的正負號：測驗
Discover Topics
Linear Programming or Linear Optimization
Isosceles Triangles
Random Variables
Area
Incircle or Inscribed Circle