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周界
Author:
kennylau
,
Anthony OR 柯志明
周界
GeoGebra
New Resources
畫出對稱圖形
sanjiaohanshu
美國國旗 (Codex 版)
近似值：有效數字
Earth with coastline
Discover Resources
No. 7 of Exercise 12C
線之極點定理 / pole of a line theorem
三角
圓相切
串珠(大小不同)
Discover Topics
Perimeter
Percentages
Vectors 2D (Two-Dimensional)
Linear Regression
Tangent Function