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相同圖形的拼砌（有兩組平行線的四邊形）
Author:
ho ting chit
GeoGebra
New Resources
球体的体积推导
找出對稱軸
兩位數除以一位數（二）
判斷球體
兩位數加法
Discover Resources
多邊形的切割與拼砌
弦的中點軌跡
proof AAS
Trajectory of system: y'=ℯ^(sin(y)) - y² + ln(y)
錯角---水平平行綫
Discover Topics
Similar Triangles
Circle
Stochastic Process or Random Process
Geometric Transformations
Inequalities