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一线三等角模型
Author:
辛贺华
GeoGebra
New Resources
兩組對邊相等的四邊形
四邊形的特性
三位數除以一位數（一）
畫出對稱圖形
算柱 (兩位數)
Discover Resources
封閉區域著色２
周界(移邊)
橢圓面積的計算
球體表面積
Arithmetic Series 等差級數
Discover Topics
Definite Integral
Circumcircle or Circumscribed Circle
Geometric Distribution
Conic Sections
Integers