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九點圓
Author:
李詠甯
九點圓
GeoGebra
New Resources
sanjiaohanshu
球體建築師
三位數除以一位數（一）
兩位數加法
錐體建築師
Discover Resources
Surface area of sphere
Quiz on True Bearings 真方位角：測驗
面積
Copy of 劉徽的「割圓術」
Copy of 學生自行製作棒形圖
Discover Topics
Multiplication
Parallelogram
Plane Figures or Shapes
Curve Sketching
Logarithm