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Constructing Quadrilaterals by Four Sides (2014)
Author:
Anthony OR 柯志明
GeoGebra
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拼砌四邊形
兩位數加法
兩組對邊相等的四邊形
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（一）
Discover Resources
錯覺藝術
畢氏定理
Apollonius Problem 6 CLP Inversion 34
旋轉對稱
任意凸多边形的滚动
Discover Topics
Trigonometry
Cylinder
Algebra
Inequalities
Diagrams