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vertex of quadratic function
Author:
Felix Yip Wing Chung
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三位數除以一位數（一）
錐體建築師
GeoGebra笔记功能体验课件
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
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畢氏定理倒水法
Simulation of the uniform variable linear motion with GeoGebra
P4 多邊形周界01 測試
到两点距离之积为定值的点的轨迹
垂心
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Circumcircle or Circumscribed Circle
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General Quadrilateral