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黎曼和
Author:
chungYT
GeoGebra
New Resources
畫出對稱圖形
找出對稱軸
異分母分數減法
三位數除以一位數（一）
拼砌四邊形
Discover Resources
四下_認識小數(教師版)
大邊對大角
Circle
螺旋線
-3/2 ≤ cosα + cosβ + cosγ ≤ 3
Discover Topics
Division
General Quadrilateral
Quadratic Equations
Binomial Distribution
Subtraction