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伸展收縮變換
Author:
takaywong
GeoGebra
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異分母分數減法
兩組對邊相等的四邊形
錐體建築師
三位數除以一位數（二）
找出對稱軸
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凹面鏡成像
How to reconstruct a quadrilateral farm to a triangular one with the same area?
平行2
扇形旋轉2
閱讀鐘面及數字鐘（時和分）的副本
Discover Topics
Polynomial Functions
Rational Numbers
Subtraction
Perimeter
Prism