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Author:
吳秉沂
GeoGebra
New Resources
Nested spiral octagon
三位數除以一位數（二）
判斷球體
四邊形的特性
美國國旗 (Codex 版)
Discover Resources
蝴蝶定理推廣證明2(交比)
正多面體
拋物線的幾何性質
工具：PlaneText, PlaneArrow
認識直徑
Discover Topics
Vectors 3D (Three-Dimensional)
Linear Regression
Circumcircle or Circumscribed Circle
Circle
Diagrams