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test22
Author:
tan90
GeoGebra
New Resources
找出對稱軸
算柱 (兩位數)
三位數除以一位數（二）
兩組對邊相等的四邊形
錐體建築師
Discover Resources
Triangle
平行線 (同位角 - 位置)
利用對摺找內心
圓繞圓外
仰角和俯角
Discover Topics
Secant Line or Secant
Volume
Quadratic Equations
Pythagoras or Pythagorean Theorem
Upper and Lower Sum or Riemann Sum