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初犯九點圓
Author:
XIE Yuheng
Topic:
Geometry
九點圓
GeoGebra
New Resources
四邊形的特性
兩組對邊相等和有直角的四邊形
畫出對稱圖形
拼砌四邊形
三位數除以一位數（二）
Discover Resources
過圓內一點與圓相切的圓
直線交點
菱形有甚麼特性？
ｔｅｓｔ
二次函数图象与a,m,k关系的副本
Discover Topics
Straight Lines
Pythagoras or Pythagorean Theorem
Incircle or Inscribed Circle
Curve Sketching
Pyramid