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48小時颱風動態
Author:
方文正
GeoGebra
New Resources
拼砌四邊形
三位數除以一位數（二）
畫出對稱圖形
画直线等分三角形的面积
兩位數加法
Discover Resources
简易立体几何
四角柱體（長方體）的截面
赋值保存法
平移圖形後計算面積
面积
Discover Topics
Rhombus
Vectors 2D (Two-Dimensional)
Incircle or Inscribed Circle
Quadratic Functions
Quadratic Equations