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橢圓軌跡
Author:
Ching-Hui Chou
GeoGebra
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兩組對邊相等和有直角的四邊形
GeoGebra笔记功能体验课件
找出對稱軸
【案例】2013年安徽高考15题
球体的体积推导（优化版）
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test01
三菱鏡分光 紅光與藍光的角度關係
test
Similar triangles reasons 2
拼貼11939
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Reflection
Quadratic Equations
Ellipse
Similar Triangles
Diagrams