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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
四邊形的特性
柱體建築師
兩組對邊相等和有直角的四邊形
球體建築師
球体的体积推导（优化版）
Discover Resources
正五角柱展開
数学
P6 圓周03C
Circumcentre
Copy of 分數與小數
Discover Topics
Polygons
Hypothesis Testing
Reflection
Centroid or Barycenter
Correlation