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同心圓+等分割線
Author:
許清惟
GeoGebra
New Resources
三位數除以一位數（一）
兩位數除以一位數（一）
柱體建築師
畫出對稱圖形
兩位數除以一位數（二）
Discover Resources
Prism and Cylinder 3
教案一
面積趣味題
比一比看谁小
旋转的花瓣
Discover Topics
Trigonometry
Secant Line or Secant
Fractions
Differential Calculus
Poisson Distribution