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正三角形內一點P, 到三頂點距3,4,5
Author:
Ho-Kai Chen
GeoGebra
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GeoGebra笔记功能体验课件
四邊形的特性
錐體建築師
兩組對邊相等和有直角的四邊形
拼砌四邊形
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clock
根據百分率找數量（二）: 例2
補角關係
兩個圓的中點軌跡
椭圆的中点弦的轨迹.许兴华数学
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LCM and GCD
Geometric Distribution
Ellipse
Cone
Conic Sections