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三角形四心
Author:
cyrus
GeoGebra
New Resources
垂直線的斜率
【案例】圆柱体内放置一个大球六个小球
漂亮的摇摆曲线
科氏力 (Coriolis Force)
球体的体积推导（优化版）
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最短
同位角
三个角只有一个角度数变1
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劉徽的「割圓術」的副本
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Distributions
Unit Circle
Centroid or Barycenter
Volume
Isosceles Triangles