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与椭圆焦点三角形外角平分线有关的轨迹.许兴华数学
Author:
许兴华数学
Topic:
Conic Sections
GeoGebra
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拼砌四邊形
【案例】圆柱体内放置一个大球六个小球
算柱 (兩位數)
三位數除以一位數(一)
找出對稱軸
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中線
伸展收縮變換
MathMedia150206
在釘點紙上畫垂直線
S3 Ch4.1 立體圖形(3D圖) - 十字形棱柱(ViewA)
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Boxplot
Combinatorics
Vectors 3D (Three-Dimensional)
Median Value
Circumcircle or Circumscribed Circle