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Chapter 1
Author:
mcchiu
Testing
GeoGebra
New Resources
撒针估算面积实验
中华人民共和国国旗
常见四边形是否是双心四边形
科氏力 (Coriolis Force)
异形操场
Discover Resources
周界
Subdivision
任務2的副本
学习几何
固定周界的長方形的面積變化（周界是200厘米）
Discover Topics
Polynomial Functions
Step Functions
Polygons
Circumcircle or Circumscribed Circle
Linear Programming or Linear Optimization