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错觉：挤出一块小空间
Author:
靳道阳
GeoGebra
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常见四边形是否是双心四边形
比較五件物件的重量
龙形曲线-分形龙
折扣
撒针估算面积实验
Discover Resources
二次涵数的图象y=ax^2+b
Copy of 茵01
包絡線
transformation_enlarge/reduction
垂線作圖
Discover Topics
Optimization Problems
Trapezoid
Tangent Line or Tangent
Centroid or Barycenter
Linear Programming or Linear Optimization