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椭圆的中点弦的轨迹.许兴华数学
Author:
许兴华数学
Topic:
Conic Sections
GeoGebra
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【案例】圆柱体内放置一个大球六个小球
拼砌四邊形
畫出對稱圖形
錐體建築師
【案例】2018年全国1卷理科12题
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動態角=30
算幾不等式
angle at the same segment
curve 函數的示範
学习谢维老师课件
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General Quadrilateral
Continuity
Right Triangles
Parametric Curves
Cube