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李洲意
Author:
Lee Chew Yee
GeoGebra
New Resources
近似值：有效數字
畫出對稱圖形
找出對稱軸
第八周作业
四邊形的特性
Discover Resources
arccot 的導數
正12面體內接正四面體
Sunline
Locus (What's wrong)
鉛筆畫圓
Discover Topics
Cosine
Functions
Translation
Rotation
Unit Circle