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math123456
Author:
Lau Wai Tai
GeoGebra
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兩位數加法
畫出對稱圖形
兩組對邊相等的四邊形
兩位數除以一位數（一）
球體建築師
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旋轉體：Washer Method
點跟直線的距離
長方形面積
仰角和俯角
Kumamon
Discover Topics
Sequences and Series
Addition
Plane Figures or Shapes
Standard Deviation
Derivative