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椭圆内部全等的双椭圆构造.许兴华数学
Author:
许兴华数学
Topic:
Conic Sections
GeoGebra
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判斷球體
球體建築師
球体的体积推导（优化版）
三位數除以一位數（一）
畫出對稱圖形
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圓與切線
推移矩陣（x 方向）
Center_Circle_Solution
聯立方程組
翰林數學_2下_CH3-1_多邊形的內角和
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Diagrams
Ellipse
Dilation
Cone
Vectors 3D (Three-Dimensional)