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九點圓
Author:
午安你好啊~~
九點圓
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
找出對稱軸
兩位數除以一位數（一）
三位數除以一位數（一）
Discover Resources
河內塔 (Tower of Hanoi)
近似值：小數位及有效數字
Q3-11
法線 (The Normal Line)
马鞍面旋转
Discover Topics
Pythagoras or Pythagorean Theorem
Circumcircle or Circumscribed Circle
Trapezoid
Inequalities
Rotation