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垂心(劉虹圻623)
Author:
呂麗珠
Topic:
Orthocenter
GeoGebra
New Resources
科氏力 (Coriolis Force)
圓的基本性質
圓的切線方程
三角函数 的副本
折扣
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圓錐曲線---橢圓
动态三角形
网络资源使用说明
拋物線3-平行四邊形法
仿真时钟2.0
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Equilateral Triangles
Similar Triangles
Root
Circumcircle or Circumscribed Circle
Incircle or Inscribed Circle