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椭圆的定义

Author:guomenglin

New Resources

四邉形 (四年級) 教師版
判斷球體
直角坐標平面上的旋轉變換
找出對稱軸
異分母分數減法

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平行四邊形變奏曲III
Conic section
練習1
生活中的平面圖形關係─垂直
Net of cone

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Secant Line or Secant
Geometric Transformations
LCM and GCD
Histogram
Plane Figures or Shapes

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