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球体的截面
Author:
孟宝兴
,
Anthony OR 柯志明
拖拉蓝点，观察球体的不同截面。
GeoGebra
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拼砌四邊形
畫出對稱圖形
兩組對邊相等的四邊形
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等和有直角的四邊形
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任意四邊形１比３
正弦公式1
正方形堆垛
两角差的正切公式的证明
S3 Ch4.3 例4.6a 三視圖(3D圖)
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Incircle or Inscribed Circle
Root
Perimeter
Poisson Distribution
Limits