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蝴蝶定理推廣證明1
Author:
連琨銘
GeoGebra
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圓周公式的應用
祖冲之的期望:内棋与外棋
探究三角形的全等條件
比較五件物件的重量
直線的斜率
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四心的變化II
七巧板
歪斜線夾四面體
規律物件集的製作
走进图形世界
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Numbers
Addition
Continuity
Sphere
General Quadrilateral