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九點圓
Author:
李詠甯
九點圓
GeoGebra
New Resources
三位數除以一位數（二）
找出對稱軸
兩組對邊相等的四邊形
第八周作业
兩位數除以一位數（一）
Discover Resources
等積的正六邊形與正方形
四位數
Angle at centre twice angle at circumference
三視圖01
探索二次函数的性质
Discover Topics
Linear Equations
Intersection
Circumcircle or Circumscribed Circle
Similarity Transformation or Similarity
Polygons