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Author:
李春培
GeoGebra
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算柱 (兩位數)
兩位數除以一位數(二)
近似值:有效數字
找出對稱軸
直角坐標平面上的旋轉變換
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Area of Triangle_1
判斷錐體 2
二次函數02
平面外積、有向面積、二階行列式
椭圆的一种画法.许兴华数学
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Inequalities
LCM and GCD
Perimeter
Plane Figures or Shapes
Constructions