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切割任意四邊形再拼砌成矩形
Author:
ho ting chit
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
球体的体积推导（优化版）
球體建築師
四邊形的特性
兩位數加法
Discover Resources
正四面體的反射對稱
正弦曲线sin(x)
軌跡方程式-垂直切線
對稱圖形
正方体展开图的副本
Discover Topics
Real Numbers
General Quadrilateral
Natural Numbers
Cube
Complex Numbers