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二次函数y=ax²(a>0)
Author:
吕胜
GeoGebra
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兩位數加法
球體建築師
畫出對稱圖形
找出對稱軸
拼砌四邊形
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圆在多边形上滚动
拋物線2-焦點法
Inclined plane (Angle between two planes)
P4 4N6 分數的種類及轉換 / Fraction Types and Their Conversions
达芬奇椭圆仪
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Centroid or Barycenter
Median Line
Scalene Triangles
Equations
Vectors 2D (Two-Dimensional)