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Author:
马云辉
GeoGebra
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兩組對邊相等和有直角的四邊形
拼砌四邊形
三位數除以一位數（一）
畫出對稱圖形
第八周作业
Discover Resources
正立方體中的正四面體
餘弦定理
Witch of Agnesi
兩向量的比
Copy of 韻01
Discover Topics
Circumcircle or Circumscribed Circle
Constructions
Geometric Transformations
Incircle or Inscribed Circle
Unit Circle